[LON-CAPA-users] How to realize a randomly generated downloadable data set?

Gerd Kortemeyer lon-capa-users@mail.lon-capa.org
Mon, 7 May 2007 15:14:29 -0400

On May 7, 2007, at 2:56 PM, Gerd Kortemeyer wrote:

> Would the students web-savvy enough to copy the data out of a  
> textarea?

If yes, then the problem below might do the trick. Alternatively, one  
could put a piece of JavaScript around the data which provides a "file."

> On May 7, 2007, at 2:45 PM, Peter Riegler wrote:
>> I want my students to do a frequency analysis of a noisy  
>> monofrequential signal (by FFT or whatever). What I have in mind  
>> is to have a problem where the student is offered a downloadable  
>> file together with a single numerical answer field for entering  
>> the obtained signal frequency.
>> If I had a static data file I would make a published resource out  
>> of it and hardlink it into the problem file. However, I would like  
>> to have individual, i.e. random, data files for each student. Is  
>> there a way of having dynamic data files as resources?

<script type="loncapa/perl">$omega=2*$pi/&random(30,60,1);
for ($t=0;$t<=600;$t++) {
<startouttext />Copy the data below and perform a Fourier  
analysis.<br />
<textarea cols="20" rows="10">$data</textarea><br />
What is the angular frequency of the data?<endouttext />
<numericalresponse unit="rad/s" format="3s" answer="$omega">
	<responseparam type="tolerance" default="5%" name="tol"  
description="Numerical Tolerance" />
	<textline readonly="no" />