## sketch questions in Maple TA...

I have learned in Brownstone site how to create,
using latex, sketch questions for Maple TA.
I could create a question bank, formed by sketch mode questions,
and then uploaded it to Maple TA, but the applets just don't work.
There are no java error messages.
On the java console i get messages like:
--------------------------------------------
false
false

SplinePlot.mousePressed():
Could not add node because of conflicting x-coordinate:
node with matching x-value already present in system
false
...
------------------------------------------------

## Install failure for MapleTA w/ SUSE 10.1...

I cannot install MapleTA 2.51 with SUSE 10.1. It gives the same errors as I see in the forum for Maple 10. The suggested fix for installing Maple 10, commenting out the "export LD..." line, only leads to a new install error. It says that a ".Z" file is not a gzip file. Has anyone installed MapleTA 2.51 on SUSE 10.1 successfully?

## MapleTA Blackboard plugin users ?...

Hi I was wondering how many people are using the MapleTA Blackboard plugin? Thanks - Michael

## Sketch questions in maple TA...

Hi. I'd like to write a maple TA question involving a sketch. There are standard tests used to evaluate whether the sketch designed by the student is correct, such as : \check{linear} \check{goes_through(0,1)} etc... There is a certain tolerance in these tests. If the sketch aproximately goes through point (0,1) in the previous example, it will be considered correct. My questions are : What is this tolerance ? Is it possible to set this tolerance ? if not, Is it possible to artificially create a tolerance factor (with something which would look like : (value(0)-1)

## printf in MapleTA 2.5...

In order to generate a 2x2-matrix in the question text I use
$display_matrix =maple("printf(MathML:-ExportPresentation(<<($a),($c)>|<($c),($b)>>))"); where$a, $b,$c are random numbers (see below for full question source).

In MapleTA 2.0.1 the question operates correctly. I quote here an exemplatory call to Maple taken from the console:

jvm 1 | To Maple --> printf(MathML:-ExportPresentation(<<(-4),(6^(1/2))>|<(
6^(1/2)),(-5)>>))

However, instead of depicting the corresponding matrix, MapleTA 2.5 depicts the Maple code. That this will happen can also clearly be seen in the call to Maple:

jvm 1 | To Maple --> printf("%m", 'Matrix(2,2,{(1, 1) = -2, (1, 2) = 2*2^(1
/2), (2, 1) = 2*2^(1/2), (2, 2) = -4},datatype = anything,storage = rectangular,
order = Fortran_order,shape = [])');

How does it come that MapleTA 2.5 decides to add "%m" to printf? Is there a possibility to fix this by making appropriate changes in a setup file?

I would be grateful for any hint.

Peter
---
Full question source (the question asks for the eigenvalues of the shown matrix):

mode=Multi Formula@
name=eigenvalues (more ergonomic)@
editing=useHTML@
algorithm=$case = range(1,3);$c = maple("[sqrt(6),sqrt(8),2][$case]");$sign = range(-1,1,2);
$b = range(-5,5);$a = $b+($sign)*($case);$display_matrix = maple("printf(MathML:-ExportPresentation(<<($a),($c)>|<($c),($b)>>))");
$ans1=maple("1/2*(($a)+($b)-sqrt(($case)^2+4*($c)^2))");$ans2=maple("1/2*(($a)+($b)+sqrt(($case)^2+4*($c)^2))");@
question=Bestimmen Sie die Eigenwerte von \$display_matrix.

## Remove student names from the reports?...

I had a few students drop after the first few days of class, and I've deleted their records from the "administration" part of the gradebook in Maple T.A., but their names continue to appear when I generate student statistics reports. Is there a way to prevent their names from appearing the in report? Thanks, Marc