[LON-CAPA-users] Any way to do this???

[Mills, Douglas G]

Thank you Gerd. I'll work on following your model and see if I can reach my
goal.

On a side note, I notice your very systematic use of
<startouttext/>...<endouttext/> throughout your example. I started my work
in Lon-Capa using those tags quite diligently but gradually have become less
consistent with no apparent ill effects. Can you comment on their purpose
and where/how they make a difference?  Thank you!

Doug


On 5/24/12 11:10 AM, "Gerd Kortemeyer" <korte at lite.msu.edu> wrote:

> Hi,
> 
> On May 24, 2012, at 9:59 AM, Mills, Douglas G wrote:
>> 
>> 
>> if ($submission=~/\,/) { return 'EXTRA_ANSWER'; }
> 
> If there are multiple input fields within a response, then $submission is a
> pointer to an array, not a value.
> 
> I am attaching a little script that just checks if the input by the students
> is not too high. You can as well check against additional input fields within
> the same response.
> 
> - Gerd.
> 
> <part id="data">
> <startouttext /><p>Find yourself a large area away from traffic, potholes and
> black holes, and try to determine your average walking speed
> (distance/time).</p><endouttext />
> <customresponse id="mydata">
>     <answer type="loncapa/perl">for ($i=0;$i<=5;$i++) {
>     $height[$i]=$$submission[2*$i];
>     unless ($height[$i]) { return 'MISSING_ANSWER'; }
>     unless ($height[$i]=~/^[\d\.]+$/) { return 'WANTED_NUMERIC'; }
>     $time[$i]=$$submission[2*$i+1];
>     unless ($time[$i]) { return 'MISSING_ANSWER'; }
>     unless ($time[$i]=~/^[\d\.]+$/) { return 'WANTED_NUMERIC'; }
> }
> for ($i=0;$i<=5;$i++) {
>     if ($height[$i]/$time[$i]>3) { return 'INCORRECT'; }
> }
> return 'APPROX_ANS';</answer>
> <startouttext /><table><tr><th>Distance [Meters]</th><th>Time
> [Seconds]</th></tr><endouttext />
> <startouttext /><tr><td><endouttext /><textline readonly="no" /><startouttext
> />$height[0]</td><td><endouttext /><textline readonly="no" /><startouttext
> />$time[0]</td></tr><endouttext />
> <startouttext /><tr><td><endouttext /><textline readonly="no" /><startouttext
> />$height[1]</td><td><endouttext /><textline readonly="no" /><startouttext
> />$time[1]</td></tr><endouttext />
> <startouttext /><tr><td><endouttext /><textline readonly="no" /><startouttext
> />$height[2]</td><td><endouttext /><textline readonly="no" /><startouttext
> />$time[2]</td></tr><endouttext />
> <startouttext /><tr><td><endouttext /><textline readonly="no" /><startouttext
> />$height[3]</td><td><endouttext /><textline readonly="no" /><startouttext
> />$time[3]</td></tr><endouttext />
> <startouttext /><tr><td><endouttext /><textline readonly="no" /><startouttext
> />$height[4]</td><td><endouttext /><textline readonly="no" /><startouttext
> />$time[4]</td></tr><endouttext />
> <startouttext /><tr><td><endouttext /><textline readonly="no" /><startouttext
> />$height[5]</td><td><endouttext /><textline readonly="no" /><startouttext
> />$time[5]</td></tr><endouttext />
> <startouttext /></table><endouttext />
>     
> </customresponse>
> 
> </part>
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Doug

Douglas Mills
Director of Instructional Technologies
Department of Chemistry
University of Illinois
dmills at illinois.edu
(217) 244-5739