--- loncom/html/adm/help/tex/Math_Response_Problems.tex	2007/01/22 21:49:26	1.1
+++ loncom/html/adm/help/tex/Math_Response_Problems.tex	2017/01/23 20:29:42	1.5
@@ -1,57 +1,7 @@
-\label{Math_Response_Problems}
-Math Response is a way to have a problem graded based on an algorithm that is executed inside of a computer algebra system. 
-The use of this response type is
-generally discouraged, since the responses will not be analyzable by the LON-CAPA statistics tools.
+\label{Math_Response_Problems}\index{Math Response}
 
-Which computer algebra system is to be used is specified in the cas argument of the mathresponse tag; currently, only Maxima is available.
-LON-CAPA sets up two arrays inside the computer algebra system: RESPONSE and LONCAPALIST. RESPONSE contains the student input by component, for example, if "3,42,17" is entered, RESPONSE[2] would be 42. LONCAPALIST contains the arguments passed in the args of mathresponse.
+Math Response is a way to have a problem graded based on an algorithm that is executed inside of a 
+computer algebra system based on an algorithm written by the problem author. It is extremely powerful, 
+as it tests answers for conditions rather than agreement with a particular correct answer. An unfortunate
+byproduct, however, is that it cannot be analyzed by several of the LON-CAPA statistics tools.
 
-The answerdisplay is what is displayed when the problem is in "Show Answer" mode.
-
-The following example illustrates this.
-\begin{verbatim}
-<problem>
-<script type="loncapa/perl">
-$a1 = random(-6,6,4);
-$a2 = random(-6,6,4);
-$n1 = random(3,11,2);
-$n2 = random(2,10,2);
-$function = "$a1*cos($n1*x)+$a2*sin($n2*x)";
-$example=&xmlparse('An example would be <m eval="on">$(sin($n1\cdot x)+cos($n2\cdot x))/\sqrt{2}$</m>');</script>
-<startouttext />
-Give an example of a function
-<ol>
-<li>which is orthogonal to <algebra>$function</algebra> with respect to the
-scalar product
-<m>\[<g \mid h> =
-\frac{1}{\pi} \int_{-\pi}^{\pi}dx g(x) \cdot h(x)\]</m>
-</li>
-<li>whose norm is 1.</li>
-</ol><endouttext />
-<mathresponse answerdisplay="$example" cas="maxima" args="$function">
-<answer>overlap:integrate((RESPONSE[1])*(LONCAPALIST[1]),x,-%pi,%pi)/%pi;
-norm:integrate((RESPONSE[1])*(RESPONSE[1]),x,-%pi,%pi)/%pi;
-is(overlap=0 and norm=1);</answer>
-<textline readonly="no" size="50" />
-<hintgroup showoncorrect="no">
-<mathhint name="ortho" args="$function" cas="maxima">
-<answer>overlap: integrate((LONCAPALIST[1])*(RESPONSE[1]),x,-%pi,%pi)/%pi;
-is(not overlap = 0);</answer>
-</mathhint>
-<mathhint name="norm" args="$function" cas="maxima">
-<answer>norm: integrate((RESPONSE[1])*(RESPONSE[1]),x,-%pi,%pi)/%pi;
-is(not norm = 1);</answer>
-</mathhint> <hintpart on="norm">
-<startouttext />
-The function you have provided does not have a norm of one.<endouttext />
-</hintpart>
-<hintpart on="ortho">
-<startouttext />
-The function you have provided is not orthogonal.<endouttext />
-</hintpart>
-</hintgroup>
-</mathresponse>
-<postanswerdate><startouttext /><p>Note that with respect to the above norm, <m>$\cos(nx)$</m> is perpendicular to <m>$\sin(nx)$</m> and perpendicular to <m>$\cos(mx)$</m> for <m>$n\ne m$</m>.</p><endouttext />
-</postanswerdate>
-</problem>
-\end{verbatim}