From glhardin at purdue.edu  Fri May  1 18:03:56 2020
From: glhardin at purdue.edu (Harding, Gene L)
Date: Fri, 1 May 2020 22:03:56 +0000
Subject: [LON-CAPA-users] Polar Format gnuplots
Message-ID: <CH2PR22MB1877DF43A479DFF797D80FD6B0AB0@CH2PR22MB1877.namprd22.prod.outlook.com>

Hi,

Has anyone done polar-format gnuplots in LON-CAPA? Would you be willing to share an example? This is my first foray into polar gnuplots. I am having trouble getting the angle to display around the perimeter. It's rendering x- and y-axis values instead of angle and radius values.

Best regards,

Gene L. Harding, PE
Associate Professor of ECET
Purdue University
574-520-4190
https://polytechnic.purdue.edu/south-bend/

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From athanas at pitt.edu  Fri May  1 19:28:00 2020
From: athanas at pitt.edu (Athanas, Angela)
Date: Fri, 1 May 2020 23:28:00 +0000
Subject: [LON-CAPA-users] {Disarmed} Re: Polar Format gnuplots
In-Reply-To: <CH2PR22MB1877DF43A479DFF797D80FD6B0AB0@CH2PR22MB1877.namprd22.prod.outlook.com>
References: <CH2PR22MB1877DF43A479DFF797D80FD6B0AB0@CH2PR22MB1877.namprd22.prod.outlook.com>
Message-ID: <MN2PR04MB6832A22E6FBF297D5C5A8E42D9AB0@MN2PR04MB6832.namprd04.prod.outlook.com>

I have a couple of polar area problems. Here's one:

<problem>
    <script type="loncapa/perl">
$a=&random(5,10,1); $a1=&random(1,3,1);  $b=$a-1;
for ($x = 0; $x<=2*3.141592654; $x+= 0.01) {
     push @X1, ($a+$b*sin($x))*cos($x);
     push @Y1, ($a+$b*sin($x))*sin($x);
     push @X2, ($a+$b*sin($x))*cos($x);     push @Y2, 0;
     push @X3, 0; push @Y3, ($a+$b*sin($x))*sin($x); }
$area=$a**2/2+$b**2/4;
$area1="$area*$pi";
 </script>
 <startouttext />
<br />
Determine the area of the right half of the cardioid formed by <m eval="on">\[  r = $a + $b \sin{\theta} \, \] </m> <p />

<endouttext />
<gnuplot width="400" grid="off" align="center" font="medium" height="300" border="on" alttag="dynamically generated plot" bgcolor="xffffff" fgcolor="x000000" transparent="off">
     <curve linestyle="lines" name="" color="x8B0000" pointtype="1" pointsize="1">
         <data>@X1</data>
         <data>@Y1</data>
     </curve>
    <curve linestyle="lines" name="" color="x000000" pointtype="1" pointsize="2">
         <data>@X2</data>
         <data>@Y2</data>
     </curve>
    <curve linestyle="lines" name="" color="x000000" pointtype="1" pointsize="2">
         <data>@X3</data>
         <data>@Y3</data>
     </curve>
  </gnuplot>
<p />
<startouttext />Area of cardioid right half is <endouttext />
<formularesponse answer="$area1" samples="x,pi at 3,$pi:9,$pi#4" id="11">
<responseparam name="tol" default="0.001" description="Numerical Tolerance" type="tolerance" />
        <textline size="35" readonly="no" />
    </formularesponse>
</problem>


________________________________
From: LON-CAPA-users <lon-capa-users-bounces at mail.lon-capa.org> on behalf of Harding, Gene L <glhardin at purdue.edu>
Sent: Friday, May 1, 2020 6:03 PM
To: Discussion list for LON-CAPA users <lon-capa-users at mail.lon-capa.org>
Subject: [LON-CAPA-users] Polar Format gnuplots


Hi,



Has anyone done polar-format gnuplots in LON-CAPA? Would you be willing to share an example? This is my first foray into polar gnuplots. I am having trouble getting the angle to display around the perimeter. It?s rendering x- and y-axis values instead of angle and radius values.



Best regards,



Gene L. Harding, PE

Associate Professor of ECET

Purdue University

574-520-4190

https://polytechnic.purdue.edu/south-bend/<https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpolytechnic.purdue.edu%2Fsouth-bend%2F&data=02%7C01%7Cathanas%40pitt.edu%7Cfad47791d6c841b74f7908d7ee1bafef%7C9ef9f489e0a04eeb87cc3a526112fd0d%7C1%7C0%7C637239675012270173&sdata=BxFc6JckzEaHORzCXuu3bO3AgOEJyqxsirfeqygrBg0%3D&reserved=0>


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From raeburn at msu.edu  Fri May  1 19:38:23 2020
From: raeburn at msu.edu (Raeburn, Stuart)
Date: Fri, 1 May 2020 23:38:23 +0000
Subject: [LON-CAPA-users] Polar Format gnuplots
In-Reply-To: <CH2PR22MB1877DF43A479DFF797D80FD6B0AB0@CH2PR22MB1877.namprd22.prod.outlook.com>
References: <CH2PR22MB1877DF43A479DFF797D80FD6B0AB0@CH2PR22MB1877.namprd22.prod.outlook.com>
Message-ID: <DM5PR1201MB0092827B88A93AD67154A7D9B6AB0@DM5PR1201MB0092.namprd12.prod.outlook.com>

Gene,

>
> I am having trouble getting the angle to display around the perimeter.
>

One solution is to create 12 labels at the appropriate positions around the perimeter.  See example below:

<problem>
<gnuplot width="300" transparent="on" samples="100" grid="on" font="10" bgcolor="#ffffff" height="300" align="left" fgcolor="#000000" border="on" plottype="Polar" gridtype="Polar">
<curve linestyle="linespoints" name="Rose Plot" pointtype="0" color="#000000">
<function>2*sin(4*t)</function>
</curve>
    <axis yzero="off" xformat="off" xmin="-2" yformat="off" color="#000000" ymax="2.0" ymin="-2.0" xmax="2.0" xzero="off" />
    <label justify="center" xpos="1.75" rotate="0" ypos="-1">330</label>
    <label justify="center" xpos="1" rotate="0" ypos="-1.75">300</label>
    <label justify="center" xpos="0" rotate="0" ypos="-2">270</label>
    <label justify="center" xpos="-1" rotate="0" ypos="-1.75">240</label>
    <label justify="center" xpos="-1.75" rotate="0" ypos="-1">210</label>
    <label justify="center" xpos="-2" rotate="0" ypos="0">180</label>
    <label justify="center" xpos="-1.75" rotate="0" ypos="1">150</label>
    <label justify="center" xpos="-1" rotate="0" ypos="1.75">120</label>
    <label justify="center" xpos="0" rotate="0" ypos="2">90</label>
    <label justify="center" xpos="1" rotate="0" ypos="1.75">60</label>
    <label justify="center" xpos="1.75" rotate="0" ypos="1">30</label>
    <label justify="center" xpos="2" rotate="0" ypos="0">0</label>
</gnuplot>
</problem>

Stuart Raeburn
LON-CAPA Academic Consortium
________________________________________
From: LON-CAPA-users <lon-capa-users-bounces at mail.lon-capa.org> on behalf of Harding, Gene L <glhardin at purdue.edu>
Sent: Friday, May 1, 2020 6:03 PM
To: Discussion list for LON-CAPA users
Subject: [LON-CAPA-users] Polar Format gnuplots

Hi,

Has anyone done polar-format gnuplots in LON-CAPA? Would you be willing to share an example? This is my first foray into polar gnuplots. I am having trouble getting the angle to display around the perimeter. It?s rendering x- and y-axis values instead of angle and radius values.

Best regards,

Gene L. Harding, PE
Associate Professor of ECET
Purdue University
574-520-4190
https://polytechnic.purdue.edu/south-bend/<https://urldefense.com/v3/__https://polytechnic.purdue.edu/south-bend/__;!!HXCxUKc!gwnWeIuZbYH7OpyeGkKict-e4U4QcS5Lo7I99h-JRBCP_rH0G096JKDE0u-xZQ$>


From glhardin at purdue.edu  Fri May  1 19:38:58 2020
From: glhardin at purdue.edu (Harding, Gene L)
Date: Fri, 1 May 2020 23:38:58 +0000
Subject: [LON-CAPA-users] Polar Format gnuplots
In-Reply-To: <MN2PR04MB6832A22E6FBF297D5C5A8E42D9AB0@MN2PR04MB6832.namprd04.prod.outlook.com>
References: <CH2PR22MB1877DF43A479DFF797D80FD6B0AB0@CH2PR22MB1877.namprd22.prod.outlook.com>
 <MN2PR04MB6832A22E6FBF297D5C5A8E42D9AB0@MN2PR04MB6832.namprd04.prod.outlook.com>
Message-ID: <CH2PR22MB1877E339FC5E1905E5BE7BCBB0AB0@CH2PR22MB1877.namprd22.prod.outlook.com>

Hi Angela,

Thank you for sending that. If you use angular/radial coordinates, do you know if there is a way to label the angles around the circular perimeter? I figured out how to turn off the Cartesian grid, but need to display angles from 0-360 or -180 to +180 around the circle instead of x-y coordinates.

Best regards,

Gene L. Harding, PE
Associate Professor of ECET
Purdue University
574-520-4190
https://polytechnic.purdue.edu/south-bend/

From: LON-CAPA-users <lon-capa-users-bounces at mail.lon-capa.org> On Behalf Of Athanas, Angela
Sent: Friday, May 1, 2020 7:28 PM
To: Discussion list for LON-CAPA users <lon-capa-users at mail.lon-capa.org>
Subject: [LON-CAPA-users] {Disarmed} Re: Polar Format gnuplots

I have a couple of polar area problems. Here's one:

<problem>
    <script type="loncapa/perl">
$a=&random(5,10,1); $a1=&random(1,3,1);  $b=$a-1;
for ($x = 0; $x<=2*3.141592654; $x+= 0.01) {
     push @X1, ($a+$b*sin($x))*cos($x);
     push @Y1, ($a+$b*sin($x))*sin($x);
     push @X2, ($a+$b*sin($x))*cos($x);     push @Y2, 0;
     push @X3, 0; push @Y3, ($a+$b*sin($x))*sin($x); }
$area=$a**2/2+$b**2/4;
$area1="$area*$pi";
 </script>
 <startouttext />
<br />
Determine the area of the right half of the cardioid formed by <m eval="on">\[  r = $a + $b \sin{\theta} \, \] </m> <p />

<endouttext />
<gnuplot width="400" grid="off" align="center" font="medium" height="300" border="on" alttag="dynamically generated plot" bgcolor="xffffff" fgcolor="x000000" transparent="off">
     <curve linestyle="lines" name="" color="x8B0000" pointtype="1" pointsize="1">
         <data>@X1</data>
         <data>@Y1</data>
     </curve>
    <curve linestyle="lines" name="" color="x000000" pointtype="1" pointsize="2">
         <data>@X2</data>
         <data>@Y2</data>
     </curve>
    <curve linestyle="lines" name="" color="x000000" pointtype="1" pointsize="2">
         <data>@X3</data>
         <data>@Y3</data>
     </curve>
  </gnuplot>
<p />
<startouttext />Area of cardioid right half is <endouttext />
<formularesponse answer="$area1" samples="x,pi at 3,$pi:9,$pi#4" id="11">
<responseparam name="tol" default="0.001" description="Numerical Tolerance" type="tolerance" />
        <textline size="35" readonly="no" />
    </formularesponse>
</problem>


________________________________
From: LON-CAPA-users <lon-capa-users-bounces at mail.lon-capa.org<mailto:lon-capa-users-bounces at mail.lon-capa.org>> on behalf of Harding, Gene L <glhardin at purdue.edu<mailto:glhardin at purdue.edu>>
Sent: Friday, May 1, 2020 6:03 PM
To: Discussion list for LON-CAPA users <lon-capa-users at mail.lon-capa.org<mailto:lon-capa-users at mail.lon-capa.org>>
Subject: [LON-CAPA-users] Polar Format gnuplots


Hi,



Has anyone done polar-format gnuplots in LON-CAPA? Would you be willing to share an example? This is my first foray into polar gnuplots. I am having trouble getting the angle to display around the perimeter. It's rendering x- and y-axis values instead of angle and radius values.



Best regards,



Gene L. Harding, PE

Associate Professor of ECET

Purdue University

574-520-4190

MailScanner has detected a possible fraud attempt from "nam05.safelinks.protection.outlook.com" claiming to be https://polytechnic.purdue.edu/south-bend/<https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpolytechnic.purdue.edu%2Fsouth-bend%2F&data=02%7C01%7Cathanas%40pitt.edu%7Cfad47791d6c841b74f7908d7ee1bafef%7C9ef9f489e0a04eeb87cc3a526112fd0d%7C1%7C0%7C637239675012270173&sdata=BxFc6JckzEaHORzCXuu3bO3AgOEJyqxsirfeqygrBg0%3D&reserved=0>


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From glhardin at purdue.edu  Sat May  2 11:33:52 2020
From: glhardin at purdue.edu (Harding, Gene L)
Date: Sat, 2 May 2020 15:33:52 +0000
Subject: [LON-CAPA-users] Polar Format gnuplots
In-Reply-To: <CH2PR22MB1877E339FC5E1905E5BE7BCBB0AB0@CH2PR22MB1877.namprd22.prod.outlook.com>
References: <CH2PR22MB1877DF43A479DFF797D80FD6B0AB0@CH2PR22MB1877.namprd22.prod.outlook.com>
 <MN2PR04MB6832A22E6FBF297D5C5A8E42D9AB0@MN2PR04MB6832.namprd04.prod.outlook.com>
 <CH2PR22MB1877E339FC5E1905E5BE7BCBB0AB0@CH2PR22MB1877.namprd22.prod.outlook.com>
Message-ID: <CH2PR22MB18774DF16DA35C5228CD3744B0A80@CH2PR22MB1877.namprd22.prod.outlook.com>

Hi everyone,

My apologies. I should have been more specific about what I am trying to do. I want to generate some notional antenna radiation pattern plots showing main lobe, back lobe, and side lobes' sizes (both peak gain and beamwidths). These plots are normally done with radial values in dB from some negative value up to zero or some positive value. The angle values on these plots are typically marked in degrees around the perimeter.

I have found some workarounds to get something approximating a polar radiation pattern plot. I used the <title> tag to mark +90 degrees, <xaxis> to mark -90, and yaxis to mark 180, but that does not give great resolution. (The plot grid only shows radii every 30 degrees.)

Likewise, I used the axis xformat and yformat parameters, in conjunction with the xtics and ytics tags, to mark radial magnitudes, but they only work for radial values from 0 to some positive number. If there is a way to do a logarithmic scale for the radial values, I cannot figure it out.

After searching through the LON-CAPA Author manual and the gnuplot manual, I think this may be as close as I can get to the equivalent of a MATLAB (theta, rho) polar plot. It appears to be a limitation of gnuplot, not LON-CAPA.

Does anyone know for sure? Maybe there is a way to do this in Geogebra, but I think I may have to compromise for now to get a problem constructed.

My code is below in case anyone wants to see what the plot looks like.

Best regards,

Gene L. Harding, PE
Associate Professor of ECET
Purdue University
574-520-4190
https://polytechnic.purdue.edu/south-bend/


POLAR ANTENNA RADIATION PATTERN PLOT
<problem>

<script type="loncapa/perl">
$amplitude=&random(0.5,3.5,0.5);
$omega=&random(1,2,0.5);
$mainlobe_gain = &random(12,22,1);  # Max antenna gain in dB
$max_plot_radius = 5*&ceil($mainlobe_gain/5);
$backlobe_gain = &random(5,8,1);  # Antenna back lobe gain in dB
$function1 = "$mainlobe_gain * abs(cos(2*t))";
$function2 = "$backlobe_gain * abs(cos(4*t))";
</script>

<gnuplot width="600" transparent="off" samples="100" grid="on" font="9" bgcolor="xffffff"
         height="600" align="right" fgcolor="x000000" border="off"
         plottype="Polar" gridtype="Polar" minor_ticscale="0" major_ticscale="0">
    <xlabel>-90&deg;</xlabel>
    <ylabel>180&deg;</ylabel>
    <title>+90&deg;</title>
    <xtics increment="5.0" minorfreq="1" location="axis" mirror="off" end="$max_plot_radius" start="-$max_plot_radius" />
    <ytics increment="5.0" minorfreq="1" location="axis" mirror="off" end="$max_plot_radius" start="-$max_plot_radius" />
    <axis xmin="-$max_plot_radius" ymin="-$max_plot_radius" xmax="$max_plot_radius" ymax="$max_plot_radius"
          color="x000000" xformat="on" yformat="on" yzero="off" xzero="off" />
<!--    <axis xmin="-$max_gain" ymin="-$max_gain" xmax="$max_gain" ymax="$max_gain" color="x000000" xformat="off" yformat="off" yzero="off" xzero="off" />  -->
    <curve linestyle="linespoints" linewidth="3" name="My Plot" pointtype="0" color="x000000">
        <function> t<$pi/4 ? $function1 : t<7*$pi/8 ? 0 : t<9*$pi/8 ? $function2 : t<7*$pi/4 ? 0 : $function1 </function>
    </curve>
</gnuplot>

<font size="3">
<startouttext />
    The plot at right depicts an antenna's radiation pattern with radial units in dB gain. <br />
    What is the peak gain of the main antenna lobe? <br />
    A<sub>main lobe</sub> = <endouttext />

<numericalresponse answer="$mainlobe_gain" unit="dB" format="0f">
    <responseparam name="tol" type="tolerance" description="Numerical Tolerance" default="0.5" />
    <textline readonly="no" spellcheck="none" />
</numericalresponse>
</font>

</problem>

From: Harding, Gene L
Sent: Friday, May 1, 2020 7:39 PM
To: Discussion list for LON-CAPA users <lon-capa-users at mail.lon-capa.org>
Subject: RE: Polar Format gnuplots

Hi Angela,

Thank you for sending that. If you use angular/radial coordinates, do you know if there is a way to label the angles around the circular perimeter? I figured out how to turn off the Cartesian grid, but need to display angles from 0-360 or -180 to +180 around the circle instead of x-y coordinates.

Best regards,

Gene L. Harding, PE
Associate Professor of ECET
Purdue University
574-520-4190
https://polytechnic.purdue.edu/south-bend/

From: LON-CAPA-users <lon-capa-users-bounces at mail.lon-capa.org<mailto:lon-capa-users-bounces at mail.lon-capa.org>> On Behalf Of Athanas, Angela
Sent: Friday, May 1, 2020 7:28 PM
To: Discussion list for LON-CAPA users <lon-capa-users at mail.lon-capa.org<mailto:lon-capa-users at mail.lon-capa.org>>
Subject: [LON-CAPA-users] {Disarmed} Re: Polar Format gnuplots

I have a couple of polar area problems. Here's one:

<problem>
    <script type="loncapa/perl">
$a=&random(5,10,1); $a1=&random(1,3,1);  $b=$a-1;
for ($x = 0; $x<=2*3.141592654; $x+= 0.01) {
     push @X1, ($a+$b*sin($x))*cos($x);
     push @Y1, ($a+$b*sin($x))*sin($x);
     push @X2, ($a+$b*sin($x))*cos($x);     push @Y2, 0;
     push @X3, 0; push @Y3, ($a+$b*sin($x))*sin($x); }
$area=$a**2/2+$b**2/4;
$area1="$area*$pi";
 </script>
 <startouttext />
<br />
Determine the area of the right half of the cardioid formed by <m eval="on">\[  r = $a + $b \sin{\theta} \, \] </m> <p />

<endouttext />
<gnuplot width="400" grid="off" align="center" font="medium" height="300" border="on" alttag="dynamically generated plot" bgcolor="xffffff" fgcolor="x000000" transparent="off">
     <curve linestyle="lines" name="" color="x8B0000" pointtype="1" pointsize="1">
         <data>@X1</data>
         <data>@Y1</data>
     </curve>
    <curve linestyle="lines" name="" color="x000000" pointtype="1" pointsize="2">
         <data>@X2</data>
         <data>@Y2</data>
     </curve>
    <curve linestyle="lines" name="" color="x000000" pointtype="1" pointsize="2">
         <data>@X3</data>
         <data>@Y3</data>
     </curve>
  </gnuplot>
<p />
<startouttext />Area of cardioid right half is <endouttext />
<formularesponse answer="$area1" samples="x,pi at 3,$pi:9,$pi#4" id="11">
<responseparam name="tol" default="0.001" description="Numerical Tolerance" type="tolerance" />
        <textline size="35" readonly="no" />
    </formularesponse>
</problem>


________________________________
From: LON-CAPA-users <lon-capa-users-bounces at mail.lon-capa.org<mailto:lon-capa-users-bounces at mail.lon-capa.org>> on behalf of Harding, Gene L <glhardin at purdue.edu<mailto:glhardin at purdue.edu>>
Sent: Friday, May 1, 2020 6:03 PM
To: Discussion list for LON-CAPA users <lon-capa-users at mail.lon-capa.org<mailto:lon-capa-users at mail.lon-capa.org>>
Subject: [LON-CAPA-users] Polar Format gnuplots


Hi,



Has anyone done polar-format gnuplots in LON-CAPA? Would you be willing to share an example? This is my first foray into polar gnuplots. I am having trouble getting the angle to display around the perimeter. It's rendering x- and y-axis values instead of angle and radius values.



Best regards,



Gene L. Harding, PE

Associate Professor of ECET

Purdue University

574-520-4190

MailScanner has detected a possible fraud attempt from "nam05.safelinks.protection.outlook.com" claiming to be https://polytechnic.purdue.edu/south-bend/<https://nam05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpolytechnic.purdue.edu%2Fsouth-bend%2F&data=02%7C01%7Cathanas%40pitt.edu%7Cfad47791d6c841b74f7908d7ee1bafef%7C9ef9f489e0a04eeb87cc3a526112fd0d%7C1%7C0%7C637239675012270173&sdata=BxFc6JckzEaHORzCXuu3bO3AgOEJyqxsirfeqygrBg0%3D&reserved=0>


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From glhardin at purdue.edu  Sat May  2 11:36:00 2020
From: glhardin at purdue.edu (Harding, Gene L)
Date: Sat, 2 May 2020 15:36:00 +0000
Subject: [LON-CAPA-users] Polar Format gnuplots
In-Reply-To: <DM5PR1201MB0092827B88A93AD67154A7D9B6AB0@DM5PR1201MB0092.namprd12.prod.outlook.com>
References: <CH2PR22MB1877DF43A479DFF797D80FD6B0AB0@CH2PR22MB1877.namprd22.prod.outlook.com>
 <DM5PR1201MB0092827B88A93AD67154A7D9B6AB0@DM5PR1201MB0092.namprd12.prod.outlook.com>
Message-ID: <CH2PR22MB1877022D7840B138E17890F6B0A80@CH2PR22MB1877.namprd22.prod.outlook.com>

Oh, wow. I just realized my email was not "connected" for some reason. Thanks Stuart! I will play with the code you sent a bit.
BR,

Gene L. Harding, PE
Associate Professor of ECET
Purdue University
574-520-4190
https://polytechnic.purdue.edu/south-bend/

-----Original Message-----
From: LON-CAPA-users <lon-capa-users-bounces at mail.lon-capa.org> On Behalf Of Raeburn, Stuart
Sent: Friday, May 1, 2020 7:38 PM
To: Discussion list for LON-CAPA users <lon-capa-users at mail.lon-capa.org>
Subject: Re: [LON-CAPA-users] Polar Format gnuplots

Gene,

>
> I am having trouble getting the angle to display around the perimeter.
>

One solution is to create 12 labels at the appropriate positions around the perimeter.  See example below:

<problem>
<gnuplot width="300" transparent="on" samples="100" grid="on" font="10" bgcolor="#ffffff" height="300" align="left" fgcolor="#000000" border="on" plottype="Polar" gridtype="Polar"> <curve linestyle="linespoints" name="Rose Plot" pointtype="0" color="#000000"> <function>2*sin(4*t)</function> </curve>
    <axis yzero="off" xformat="off" xmin="-2" yformat="off" color="#000000" ymax="2.0" ymin="-2.0" xmax="2.0" xzero="off" />
    <label justify="center" xpos="1.75" rotate="0" ypos="-1">330</label>
    <label justify="center" xpos="1" rotate="0" ypos="-1.75">300</label>
    <label justify="center" xpos="0" rotate="0" ypos="-2">270</label>
    <label justify="center" xpos="-1" rotate="0" ypos="-1.75">240</label>
    <label justify="center" xpos="-1.75" rotate="0" ypos="-1">210</label>
    <label justify="center" xpos="-2" rotate="0" ypos="0">180</label>
    <label justify="center" xpos="-1.75" rotate="0" ypos="1">150</label>
    <label justify="center" xpos="-1" rotate="0" ypos="1.75">120</label>
    <label justify="center" xpos="0" rotate="0" ypos="2">90</label>
    <label justify="center" xpos="1" rotate="0" ypos="1.75">60</label>
    <label justify="center" xpos="1.75" rotate="0" ypos="1">30</label>
    <label justify="center" xpos="2" rotate="0" ypos="0">0</label> </gnuplot> </problem>

Stuart Raeburn
LON-CAPA Academic Consortium
________________________________________
From: LON-CAPA-users <lon-capa-users-bounces at mail.lon-capa.org> on behalf of Harding, Gene L <glhardin at purdue.edu>
Sent: Friday, May 1, 2020 6:03 PM
To: Discussion list for LON-CAPA users
Subject: [LON-CAPA-users] Polar Format gnuplots

Hi,

Has anyone done polar-format gnuplots in LON-CAPA? Would you be willing to share an example? This is my first foray into polar gnuplots. I am having trouble getting the angle to display around the perimeter. It's rendering x- and y-axis values instead of angle and radius values.

Best regards,

Gene L. Harding, PE
Associate Professor of ECET
Purdue University
574-520-4190
https://polytechnic.purdue.edu/south-bend/<https://urldefense.com/v3/__https://polytechnic.purdue.edu/south-bend/__;!!HXCxUKc!gwnWeIuZbYH7OpyeGkKict-e4U4QcS5Lo7I99h-JRBCP_rH0G096JKDE0u-xZQ$>

_______________________________________________
LON-CAPA-users mailing list
LON-CAPA-users at mail.lon-capa.org
http://mail.lon-capa.org/mailman/listinfo/lon-capa-users

From abertr at tcc.fl.edu  Tue May 26 08:33:30 2020
From: abertr at tcc.fl.edu (Rex Abert)
Date: Tue, 26 May 2020 08:33:30 -0400
Subject: [LON-CAPA-users] Using symbols for "infinity" in responses
Message-ID: <7dd65ace-9b1d-1252-897a-4ba2588735a8@tcc.fl.edu>

I am developing some <formularesponse> questions for Calculus I limits
at infinity.  Sometimes the answer is +infinity or -infinity, sometimes
a constant (horizontal asymptote).  If I set the correct response as
"inf" (lowercase), the previewer correctly interprets the symbol as
expected.  A guide published by Purdue suggests that all caps should be
used, "INF."? I had the answer in a question set as "-inf" and a student
entered "-INF" and it was marked incorrect, as Maxima should, because
uppercase and lowercase symbols are different to Maxima.

I guess I am just looking for clarification on a standard way to do this
in LC, given the behavior of the javascript previewer.

--
Rex Abert
Professor of Mathematics
Tallahassee Community College



***Due to Florida's very broad public records law, most written communications to or from Tallahassee Community College employees regarding College business are public records, available to the public and media upon request. Therefore, this email communication and your response may be subject to public disclosure.***

From jgray at math.sfu.ca  Tue May 26 18:13:50 2020
From: jgray at math.sfu.ca (Justin Gray)
Date: Tue, 26 May 2020 15:13:50 -0700
Subject: [LON-CAPA-users] Using symbols for "infinity" in responses
In-Reply-To: <402c624a28284434995964cf63c689d1@ITS-EXCHANGE04.sfu.ca>
References: <402c624a28284434995964cf63c689d1@ITS-EXCHANGE04.sfu.ca>
Message-ID: <CALZ44BVu2fno8YQ3Wtd=EcVGpXY-J_BO4emRCTO=UabOMYuazg@mail.gmail.com>

Hi Rex,

I see that Purdue has a guide on Entering Math Expressions in LON-CAPA at
https://www.math.purdue.edu/academic/files/courses/2016summer/MA16010/EnteringMathExpressionsinLON-CAPA.pdf

While it is possible to author questions in LON-CAPA that accept this
syntax, I do not believe that this is strict Maxima syntax:

Infinity is written as inf
Negative infinity is written as minf (though I think -inf will still work)
The constant pi is written %pi
The exponential function is written as %e^(x) or exp(x)

ln(x) is written as log(x) - this is confusing to students but you could
write a mathresponse problem to redefine ln(x) to be log(x) in the answer
algorithm if you want.
ln(x) is otherwise interpreted as l*n*x which makes accepting equivalent
answers difficult.

Best,
Justin

--

*Justin Gray*
Senior Lecturer | Department of Mathematics
Simon Fraser University | SCK 10531
8888 University Dr., Burnaby, B.C. V5A 1S6
Canada
T: 778.782.4237
Simon Fraser University is located on the Unceded Coast Salish Territories
of the x?m??k??y??m (Musqueam), S?l??lw?ta?/Selilwitulh (Tsleil-Waututh),
Kwikwitlem, and Skwxw?7mesh ?xwumixw (Squamish) Peoples


On Tue, May 26, 2020 at 5:34 AM Rex Abert <abertr at tcc.fl.edu> wrote:

> I am developing some <formularesponse> questions for Calculus I limits
> at infinity.  Sometimes the answer is +infinity or -infinity, sometimes
> a constant (horizontal asymptote).  If I set the correct response as
> "inf" (lowercase), the previewer correctly interprets the symbol as
> expected.  A guide published by Purdue suggests that all caps should be
> used, "INF."  I had the answer in a question set as "-inf" and a student
> entered "-INF" and it was marked incorrect, as Maxima should, because
> uppercase and lowercase symbols are different to Maxima.
>
> I guess I am just looking for clarification on a standard way to do this
> in LC, given the behavior of the javascript previewer.
>
> --
> Rex Abert
> Professor of Mathematics
> Tallahassee Community College
>
>
>
> ***Due to Florida's very broad public records law, most written
> communications to or from Tallahassee Community College employees regarding
> College business are public records, available to the public and media upon
> request. Therefore, this email communication and your response may be
> subject to public disclosure.***
> _______________________________________________
> LON-CAPA-users mailing list
> LON-CAPA-users at mail.lon-capa.org
> http://mail.lon-capa.org/mailman/listinfo/lon-capa-users
>
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From abertr at tcc.fl.edu  Wed May 27 08:24:27 2020
From: abertr at tcc.fl.edu (Rex Abert)
Date: Wed, 27 May 2020 08:24:27 -0400
Subject: [LON-CAPA-users] Using symbols for "infinity" in responses
In-Reply-To: <CALZ44BVu2fno8YQ3Wtd=EcVGpXY-J_BO4emRCTO=UabOMYuazg@mail.gmail.com>
References: <402c624a28284434995964cf63c689d1@ITS-EXCHANGE04.sfu.ca>
 <CALZ44BVu2fno8YQ3Wtd=EcVGpXY-J_BO4emRCTO=UabOMYuazg@mail.gmail.com>
Message-ID: <55273afa-927b-d9d4-bbab-a4ec87330092@tcc.fl.edu>

I was just wondering about whether there is (or should be) a 
"standardized" way to do it.? I have decided that what I will do is use 
a formula response with preprocessing to make student responses 
case-insensitive.

Rex

On 5/26/20 6:13 PM, Justin Gray wrote:
> CAUTION:This email originated from outside of the college. Do not 
> click links or open attachments unless you recognize the sender and 
> know the content is safe.
>
> Hi Rex,
>
> I see that Purdue has a guide on?Entering Math Expressions in LON-CAPA at
> https://www.math.purdue.edu/academic/files/courses/2016summer/MA16010/EnteringMathExpressionsinLON-CAPA.pdf
>
> While it is possible to author questions in LON-CAPA that accept this 
> syntax, I do not believe that this is strict Maxima syntax:
>
> Infinity is written as inf
> Negative infinity is written as minf?(though I think -inf will still work)
> The constant pi is written %pi
> The exponential function is written as %e^(x) or exp(x)
>
> ln(x) is written as log(x) - this is confusing to students but you 
> could write a mathresponse problem to redefine ln(x) to be log(x) in 
> the answer algorithm if you want.
> ln(x) is otherwise interpreted as l*n*x which makes accepting 
> equivalent answers difficult.
>
> Best,
> Justin
>
>
>       --
>
>       *Justin Gray*
>       Senior Lecturer | Department of Mathematics
>       Simon Fraser University | SCK 10531
>       8888 University Dr., Burnaby, B.C. V5A 1S6
>       Canada
>       T: 778.782.4237
>
>       Simon Fraser University is located on the Unceded Coast Salish
>       Territories of the x?m??k??y??m (Musqueam),
>       S?l??lw?ta?/Selilwitulh (Tsleil-Waututh), Kwikwitlem, and
>       Skwxw?7mesh ?xwumixw (Squamish) Peoples
>
>
>
> On Tue, May 26, 2020 at 5:34 AM Rex Abert <abertr at tcc.fl.edu 
> <mailto:abertr at tcc.fl.edu>> wrote:
>
>     I am developing some <formularesponse> questions for Calculus I limits
>     at infinity.? Sometimes the answer is +infinity or -infinity,
>     sometimes
>     a constant (horizontal asymptote).? If I set the correct response as
>     "inf" (lowercase), the previewer correctly interprets the symbol as
>     expected.? A guide published by Purdue suggests that all caps
>     should be
>     used, "INF."? I had the answer in a question set as "-inf" and a
>     student
>     entered "-INF" and it was marked incorrect, as Maxima should, because
>     uppercase and lowercase symbols are different to Maxima.
>
>     I guess I am just looking for clarification on a standard way to
>     do this
>     in LC, given the behavior of the javascript previewer.
>
>     --
>     Rex Abert
>     Professor of Mathematics
>     Tallahassee Community College
>
>
>
>     ***Due to Florida's very broad public records law, most written
>     communications to or from Tallahassee Community College employees
>     regarding College business are public records, available to the
>     public and media upon request. Therefore, this email communication
>     and your response may be subject to public disclosure.***
>     _______________________________________________
>     LON-CAPA-users mailing list
>     LON-CAPA-users at mail.lon-capa.org
>     <mailto:LON-CAPA-users at mail.lon-capa.org>
>     http://mail.lon-capa.org/mailman/listinfo/lon-capa-users
>
>
> _______________________________________________
> LON-CAPA-users mailing list
> LON-CAPA-users at mail.lon-capa.org
> http://mail.lon-capa.org/mailman/listinfo/lon-capa-users

-- 
Rex Abert
Professor of Mathematics
Tallahassee Community College

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From abertr at tcc.fl.edu  Wed May 27 08:38:18 2020
From: abertr at tcc.fl.edu (Rex Abert)
Date: Wed, 27 May 2020 08:38:18 -0400
Subject: [LON-CAPA-users] Using symbols for "infinity" in responses
In-Reply-To: <55273afa-927b-d9d4-bbab-a4ec87330092@tcc.fl.edu>
References: <402c624a28284434995964cf63c689d1@ITS-EXCHANGE04.sfu.ca>
 <CALZ44BVu2fno8YQ3Wtd=EcVGpXY-J_BO4emRCTO=UabOMYuazg@mail.gmail.com>
 <55273afa-927b-d9d4-bbab-a4ec87330092@tcc.fl.edu>
Message-ID: <e97d11d4-58e3-1c8b-4349-68a03b1a805a@tcc.fl.edu>

This does the trick:


if($a*$d > 0){
 ? $answer = inf;
}else{
 ? $answer = -inf;
}
sub toLowerCase {
 ??? my ($response) = @_;
 ??? # Remove spaces
 ??? $response =~ s/ //g;
 ??? $response = lc $response;
 ??? return $response;
}
</script>

<startouttext />
 ??? Evaluate the limit. <br /><br />
 ??? <m eval="on">$$ $lim1 $$</m>
<endouttext />

<p />
<formularesponse answer="$answer" id="12" preprocess="toLowerCase">
 ??? <textline />
 ??? Enter a number, reduced fraction, or "inf" for <m>$ \infty</m>, 
"-inf" for <m>$ -\infty</m>, or "DNE" if a limit does not exist.
</formularesponse>

On 5/27/20 8:24 AM, Rex Abert wrote:
>
> I was just wondering about whether there is (or should be) a 
> "standardized" way to do it.? I have decided that what I will do is 
> use a formula response with preprocessing to make student responses 
> case-insensitive.
>
> Rex
>
> On 5/26/20 6:13 PM, Justin Gray wrote:
>> CAUTION:This email originated from outside of the college. Do not 
>> click links or open attachments unless you recognize the sender and 
>> know the content is safe.
>>
>> Hi Rex,
>>
>> I see that Purdue has a guide on?Entering Math Expressions in LON-CAPA at
>> https://www.math.purdue.edu/academic/files/courses/2016summer/MA16010/EnteringMathExpressionsinLON-CAPA.pdf
>>
>> While it is possible to author questions in LON-CAPA that accept this 
>> syntax, I do not believe that this is strict Maxima syntax:
>>
>> Infinity is written as inf
>> Negative infinity is written as minf?(though I think -inf will still 
>> work)
>> The constant pi is written %pi
>> The exponential function is written as %e^(x) or exp(x)
>>
>> ln(x) is written as log(x) - this is confusing to students but you 
>> could write a mathresponse problem to redefine ln(x) to be log(x) in 
>> the answer algorithm if you want.
>> ln(x) is otherwise interpreted as l*n*x which makes accepting 
>> equivalent answers difficult.
>>
>> Best,
>> Justin
>>
>>
>>       --
>>
>>       *Justin Gray*
>>       Senior Lecturer | Department of Mathematics
>>       Simon Fraser University | SCK 10531
>>       8888 University Dr., Burnaby, B.C. V5A 1S6
>>       Canada
>>       T: 778.782.4237
>>
>>       Simon Fraser University is located on the Unceded Coast Salish
>>       Territories of the x?m??k??y??m (Musqueam),
>>       S?l??lw?ta?/Selilwitulh (Tsleil-Waututh), Kwikwitlem, and
>>       Skwxw?7mesh ?xwumixw (Squamish) Peoples
>>
>>
>>
>> On Tue, May 26, 2020 at 5:34 AM Rex Abert <abertr at tcc.fl.edu 
>> <mailto:abertr at tcc.fl.edu>> wrote:
>>
>>     I am developing some <formularesponse> questions for Calculus I
>>     limits
>>     at infinity.? Sometimes the answer is +infinity or -infinity,
>>     sometimes
>>     a constant (horizontal asymptote).? If I set the correct response as
>>     "inf" (lowercase), the previewer correctly interprets the symbol as
>>     expected.? A guide published by Purdue suggests that all caps
>>     should be
>>     used, "INF."? I had the answer in a question set as "-inf" and a
>>     student
>>     entered "-INF" and it was marked incorrect, as Maxima should, because
>>     uppercase and lowercase symbols are different to Maxima.
>>
>>     I guess I am just looking for clarification on a standard way to
>>     do this
>>     in LC, given the behavior of the javascript previewer.
>>
>>     --
>>     Rex Abert
>>     Professor of Mathematics
>>     Tallahassee Community College
>>
>>
>>
>>     ***Due to Florida's very broad public records law, most written
>>     communications to or from Tallahassee Community College employees
>>     regarding College business are public records, available to the
>>     public and media upon request. Therefore, this email
>>     communication and your response may be subject to public
>>     disclosure.***
>>     _______________________________________________
>>     LON-CAPA-users mailing list
>>     LON-CAPA-users at mail.lon-capa.org
>>     <mailto:LON-CAPA-users at mail.lon-capa.org>
>>     http://mail.lon-capa.org/mailman/listinfo/lon-capa-users
>>
>>
>> _______________________________________________
>> LON-CAPA-users mailing list
>> LON-CAPA-users at mail.lon-capa.org
>> http://mail.lon-capa.org/mailman/listinfo/lon-capa-users
> -- 
> Rex Abert
> Professor of Mathematics
> Tallahassee Community College
>
> _______________________________________________
> LON-CAPA-users mailing list
> LON-CAPA-users at mail.lon-capa.org
> http://mail.lon-capa.org/mailman/listinfo/lon-capa-users

-- 
Rex Abert
Professor of Mathematics
Tallahassee Community College

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From raeburn at msu.edu  Wed May 27 09:17:39 2020
From: raeburn at msu.edu (Raeburn, Stuart)
Date: Wed, 27 May 2020 13:17:39 +0000
Subject: [LON-CAPA-users] Using symbols for "infinity" in responses
In-Reply-To: <55273afa-927b-d9d4-bbab-a4ec87330092@tcc.fl.edu>
References: <402c624a28284434995964cf63c689d1@ITS-EXCHANGE04.sfu.ca>
 <CALZ44BVu2fno8YQ3Wtd=EcVGpXY-J_BO4emRCTO=UabOMYuazg@mail.gmail.com>,
 <55273afa-927b-d9d4-bbab-a4ec87330092@tcc.fl.edu>
Message-ID: <DM6PR12MB3164F6CF82580CDF742D0E3DB6B10@DM6PR12MB3164.namprd12.prod.outlook.com>

Hello Rex,

The LON-CAPA javascript previewer available for forumularresponse items will display Unicode characters for inf and minf in the preview, but the text entered in the "Submit Answer" textbox by the student will be what is submitted by the web form.

(See: the enode.js file in loncom/html/adm/LC_math_editor/src/enode.js in the LON-CAPA source repository -- source.loncapaorg/cgi-bin/cvsweb.cgi/ for the mapping to Unicode.

Maxima itself supports: inf, minf, and -inf

formularesponse with a preprocessor routine to convert INF or Inf to all inf in a student's submission before sending to Maxima for evaluation is what I would do in the current LON-CAPA.

>
> I was just wondering about whether there is (or should be) a "standardized" way to do it. 
>

Internally in LON-CAPA, a routine: maxima_cas_formula_fix() in lonmaxima.pm is used to (a) take care of implicit multiplication, and (b) convert pi to %pi, if pi is present, unless pi happens to be within a variable name (e.g., pie).

If conversion of INF and Inf were to be made "standard" (i.e., without use of an author-defined preprocessor routine) then the likely approach would be to include an appropriate regular expression in maxima_cas_formula_fix().

Stuart Raeburn
LON-CAPA Academic Consortium
________________________________________
From: LON-CAPA-users <lon-capa-users-bounces at mail.lon-capa.org> on behalf of Rex Abert <abertr at tcc.fl.edu>
Sent: Wednesday, May 27, 2020 8:24 AM
To: lon-capa-users at mail.lon-capa.org
Subject: Re: [LON-CAPA-users] Using symbols for "infinity" in responses

I was just wondering about whether there is (or should be) a "standardized" way to do it.  I have decided that what I will do is use a formula response with preprocessing to make student responses case-insensitive.

Rex

On 5/26/20 6:13 PM, Justin Gray wrote:
CAUTION: This email originated from outside of the college. Do not click links or open attachments unless you recognize the sender and know the content is safe.

Hi Rex,

I see that Purdue has a guide on Entering Math Expressions in LON-CAPA at
https://www.math.purdue.edu/academic/files/courses/2016summer/MA16010/EnteringMathExpressionsinLON-CAPA.pdf<https://urldefense.com/v3/__https://www.math.purdue.edu/academic/files/courses/2016summer/MA16010/EnteringMathExpressionsinLON-CAPA.pdf__;!!HXCxUKc!lYy8XPbj8zY_tsKaNb2xijqlp21RW7Kz2eD4WPcy7I2taPcH9ReQgDnUlHB9kA$>

While it is possible to author questions in LON-CAPA that accept this syntax, I do not believe that this is strict Maxima syntax:

Infinity is written as inf
Negative infinity is written as minf (though I think -inf will still work)
The constant pi is written %pi
The exponential function is written as %e^(x) or exp(x)

ln(x) is written as log(x) - this is confusing to students but you could write a mathresponse problem to redefine ln(x) to be log(x) in the answer algorithm if you want.
ln(x) is otherwise interpreted as l*n*x which makes accepting equivalent answers difficult.

Best,
Justin

--

Justin Gray
Senior Lecturer | Department of Mathematics
Simon Fraser University | SCK 10531
8888 University Dr., Burnaby, B.C. V5A 1S6
Canada
T: 778.782.4237

Simon Fraser University is located on the Unceded Coast Salish Territories of the x?m??k??y??m (Musqueam), S?l??lw?ta?/Selilwitulh (Tsleil-Waututh), Kwikwitlem, and Skwxw?7mesh ?xwumixw (Squamish) Peoples


On Tue, May 26, 2020 at 5:34 AM Rex Abert <abertr at tcc.fl.edu<mailto:abertr at tcc.fl.edu>> wrote:
I am developing some <formularesponse> questions for Calculus I limits
at infinity.  Sometimes the answer is +infinity or -infinity, sometimes
a constant (horizontal asymptote).  If I set the correct response as
"inf" (lowercase), the previewer correctly interprets the symbol as
expected.  A guide published by Purdue suggests that all caps should be
used, "INF."  I had the answer in a question set as "-inf" and a student
entered "-INF" and it was marked incorrect, as Maxima should, because
uppercase and lowercase symbols are different to Maxima.

I guess I am just looking for clarification on a standard way to do this
in LC, given the behavior of the javascript previewer.

--
Rex Abert
Professor of Mathematics
Tallahassee Community College



***Due to Florida's very broad public records law, most written communications to or from Tallahassee Community College employees regarding College business are public records, available to the public and media upon request. Therefore, this email communication and your response may be subject to public disclosure.***
_______________________________________________
LON-CAPA-users mailing list
LON-CAPA-users at mail.lon-capa.org<mailto:LON-CAPA-users at mail.lon-capa.org>
http://mail.lon-capa.org/mailman/listinfo/lon-capa-users



_______________________________________________
LON-CAPA-users mailing list
LON-CAPA-users at mail.lon-capa.org<mailto:LON-CAPA-users at mail.lon-capa.org>
http://mail.lon-capa.org/mailman/listinfo/lon-capa-users


--
Rex Abert
Professor of Mathematics
Tallahassee Community College