[LON-CAPA-users] Tolerances with Hints

[Lucas, Mark]

Carl,

Thanks for looking into that. Stuart actually tacked me on to the bug report.

The printing of the tolerance was not my main concern. The use of the variable
was so that if anyone overrode the tolerance externally (which it turns out
can’t be done for the hint), then it would display properly. I had a chunk of
code in the script that I did not copy into the note which loaded the tolerance
variable using one of the loncapa functions.

Thanks,
Mark

> On Feb 18, 2018, at 1:39 PM, Carl Lira <lira at egr.msu.edu> wrote:
> 
> Hi Mark,
> 
> It looks like you are wanting to display the tolerance in the hint? This can be done if you set the tolerance as a variable in the script. In the test environment this works OK. I have not tried to include it in a course. 
> 
> This problem provides hints if the answer is wrong but within 100% or 500%. Note that if the answer is within 100%, then both hints display because anything within 100% is also within 500%.
> 
> msu/lira/loncapa examples/conditional hints.problem
> 
> Code included here for quick reference:
> 
> <problem>
> 
> <script type="loncapa/perl">
> #Enter the computations here
> $a=&random(1,10,0.5);
> $b=&random(1,10,0.5);
> $c=$a+$b;
> $Tolerance = "10%"
> </script>
> 
> <startouttext />
> What is $a + $b?
> <endouttext />
> 
> <part id="01">
> <numericalresponse answer="$c" id="01a">
>        <responseparam name="tol" type="tolerance" default="$Tolerance" description="Numerical
> Tolerance" />
>    <textline readonly="no" spellcheck="none" />
> 
> <hintgroup showoncorrect="no">
>    <startouttext /><endouttext />
> 
> <numericalhint answer="$c" name="err100" id="11">
>    <responseparam name="tol" type="tolerance" default="100%" description="Numerical
> Tolerance" />
> </numericalhint>
> 
> <numericalhint answer="$c" name="err500" id="12">
>    <responseparam name="tol" type="tolerance" default="500%" description="Numerical
> Tolerance" />
> </numericalhint>
> 
> <hintpart on="err100">
>    <startouttext />Your answer is within +- 100%. Required tolerance $Tolerance.<br /><endouttext />
> </hintpart>
> 
> <hintpart on="err500">
>    <startouttext />Your answer is within +- 500%. Required tolerance $Tolerance.<br /><endouttext />
> </hintpart>
> 
> <hintpart on="default">
>    <startouttext />Your answer is off by more than +- 500%. Required tolerance $Tolerance.<endouttext />
> </hintpart>
> 
> </hintgroup>
> </numericalresponse>
> </part>
> </problem>
> 
> 
> 
> -----Original Message-----
> From: lon-capa-users-bounces at mail.lon-capa.org [mailto:lon-capa-users-bounces at mail.lon-capa.org] On Behalf Of Lucas, Mark
> Sent: Friday, February 16, 2018 10:43 AM
> To: lon-capa-users at mail.lon-capa.org
> Subject: [LON-CAPA-users] Tolerances with Hints
> 
> Hi,
> 
> I am looking to include a hint in a problem that occurs if a response is inside a wider
> tolerance (5%) but not within the requested tolerance (1%).
> 
> I created the following hint code and plugged this into a course to test it.
> When I look at the parameters for the problem, the tolerance for id=“11” shows
> 5% (the tolerance used in the numericalhint tags), not 1%. I found this out
> when I purposely entered an answer that was about 3% off and found that I got
> it right.
> 
> I thought I had done something like this before, but may not have
> tested it as rigorously as I thought (or I just may be deluding myself that I’ve
> done this before).
> 
> Has anyone else tried this before? Is this a feature or a bug?
> 
> Thanks!
> Mark
> 
> 
>    <numericalresponse unit="J" format="3s" answer="$W" id="11">
>      <responseparam name="tol" type="tolerance" default="1%" description="Numerical Tolerance" />
>      <responseparam name="sig" type="int_range" default="3,6" description="Significant Figures" />
>      <textline />
>    <hintgroup showoncorrect="no">
>      <numericalhint unit="J" format="3s" answer="$dEPE" name="wrongSign" id="12">
>        <responseparam name="tol" type="tolerance" default="5%" description="Numerical Tolerance" />
>        <responseparam name="sig" type="int_range" default="3,6" description="Significant Figures" />
>      </numericalhint>
>      <numericalhint unit="J" format="3s" answer="$W" name="Tol" id="14">
>        <responseparam name="tol" type="tolerance" default="5%" description="Numerical Tolerance" />
>        <responseparam name="sig" type="int_range" default="3,6" description="Significant Figures" />
>      </numericalhint>
>      <hintpart on="wrongSign">
>        <startouttext />Remember that this is the work done BY the electric field, not the work done by you.<endouttext />
>      </hintpart>
>      <hintpart on="Tol">
>        <startouttext />In this calculation you are adding a number of different terms, some of which are
>          positive and some of which are negative. 
>          There is some benefit to working this problem out algebraically and finding terms that
>          might offset each other. Remember that your answer needs to be within a tolerance of about
>          $Tolerance.<endouttext />
>      </hintpart>
>    </hintgroup>
> </numericalresponse>
> 
> 
> 
> -- 
> Mark Lucas 								email: lucasm at ohiou.edu
> 252D Clippinger Lab						phone: (740)597-2984
> Department of Physics and Astronomy			fax: (740)593-0433
> Ohio University
> Athens, OH 45701
> 
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-- 
Mark Lucas 								email: lucasm at ohiou.edu
252D Clippinger Lab						phone: (740)597-2984
Department of Physics and Astronomy			fax: (740)593-0433
Ohio University
Athens, OH 45701