[LON-CAPA-users] Hints for first LON-CAPA question

[Gerd Kortemeyer]

Hi,

On Jun 13, 2013, at 3:04 PM, Joseph Mingrone <jrm at mathstat.dal.ca> wrote:

> 
> 
> 1. How can a student submit each part of the question separately?

You'll have to wrap the responses into <part></part> to make the problem multipart. E.g.,

<part>
<startouttext />
<p>
Super Sneaker Company …
<endouttext />

<radiobuttonresponse direction="vertical" max="3" id="12" randomize="yes">
   <foilgroup>
       <foil location="random" value='true' name="foil1">
           <startouttext />Right shoe wear is generally different than left shoe wear.<endouttext />
       </foil>
       …
   </foilgroup>
</radiobuttonresponse>
</part>

<part>
<parameter name="maxtries" type="int_pos" description="Maximum Number of Tries" default="1" />
<startouttext />
<p>
After 3 months, the amount of wear …
</part>


> 
> 2. In the table, I'm building the header with $row1 .= "<td>$i+1</td>",
> but the $i+1 isn't evaluated and 0+1, 1+1, etc. is shown. How can I get
> the intended output?

This is a Perl thing. I cannot test this right now, but try

for ($i=1; $i<=$n; $i++)
{
   $row1 .= "<td>$i+1</td>";
   $row2 .= "<td>&roundto($a[$i-1],2)</td>";
   $row3 .= "<td>&roundto($b[$i-1],2)</td>";
}

> 
> 3. How can \bar{x} be displayed?

Likely not using the tth-renderer, only with MimeTeX or jsMath. Please try using the other renderers from the menu in Author Space problem display. I don't like it very much at all, but you might have to do

<m display="mimetex">$\bar{x}_a - \bar{x}_b = 0$</m> 

> 
> 4. In the last radiobuttonresponse question, only one foil is showing up
> even though I've specified max=3.  How can I make all three show up?

That's because the other two foils are still set to "unused" - you should set them to "false"

> 
> 5. This is my first attempt at a question and I have no sample code
> other than what's in the manual.  If you have any other suggestions
> about style or best practices, please pass them along.


Looks fine. Please make sure to test that it prints.

- Gerd.