[LON-CAPA-dev] How does formularesponse work

Guy Albertelli II lon-capa-dev@mail.lon-capa.org
Tue, 22 May 2007 14:57:58 -0400 (EDT)

Hi Peter,

Looks like a typo.

> we have a problem using formula response here, which brings up the 
> question how it works internally. Unfortunately, I am not really capable 
> of understanding what is going on in caparesponse.pm.
> So far, my idea of formularesponse has been that it runs nested 
> for-loops w.r.t. the sampling variables. For instance,
> <formularesponse samples="x,y@-3,-3,;2,2#4" answer="$answer" id="11">
> should result in something like
> for each x value
>     for each y value
>         check whether $answer evaluated at x and y equals
> 		response evaluated at x an y
>         if not break out of the for loops and return false
>     end
> end

Yes, it should, however you have a ; where you want a :


Will sample at x=-3,y=-3, and x=2,y=2


Will sample at 4 random points in the box defined by -3 <= x <= 2, and
-3 <= y <= 2

> <formularesponse samples="x,z,t,C@-3,-3,-3,-3;2,2,2,2#4" 
> answer="$integral" id="11">

and similarly here there is a ; where you likely want a :
guy@albertelli.com   0-7-0-9-27,137