@Pierre  I could not agree more, it would be fairly simple HTMl for them to allow the instructor to force, either Text Or Symbolic (in the same way one can force students with the Maple-Graded response type).

You would need to construct a list/array to pull from...  Although I would recommend accomplishing what you are attempting using a single maple call (why have 2???).

To fix what you have:

$selector=range(1,5,1);
$TA=maple("
option1:=geom3d[point](P1,[5,2,1]):
option2:=geom3d[point](P2,[4,0,-4]):
option3:=geom3d[point](P3,[1,1,1]):
option4:=geom3d[plane](E1,[P1,P2,P3]):
option5:=geom3d[Equation](E1,[x,y,z]):
[option1,option2,option3,option4,option5];
");

$LE=maple("$TA[$selector]"); 

A BETTER WAY that is more efficient (single maple call)....

$selector=range(1,5,1);
$TA=maple("
option1:=geom3d[point](P1,[5,2,1]):
option2:=geom3d[point](P2,[4,0,-4]):
option3:=geom3d[point](P3,[1,1,1]):
option4:=geom3d[plane](E1,[P1,P2,P3]):
option5:=geom3d[Equation](E1,[x,y,z]):
listOfAll:=[option1,option2,option3,option4,option5];
selected:=listOfAll[$selector];
[convert(selected,string),convert(listOfAll,string)]
");

$theChosenOne=switch(0,$TA);
$theRest=switch(1,$TA);

@Pierre

This would look like this:

I have come to realise there are limitations on what mapleplot can do, but I have not found a clear documentation about it. I'll repost a question on what I am trying to do in the other forum about writing questions.

I forgot to mention, for you to see it work the question must be on an actual assignment.  Also it goes without saying that the assignment will need more than one question.

Thank you @josvanweert I followed your hint using LaTex to create the curly bracket and adjusting lenght adding blank rows. Additionaly I placed both the sub-functions and respective domains into a table.

I could be wrong, but I think you can use the HTML code associated with the plot in the switch function.  Which would randomly select the HTML code for a given plot.  This in effect will do what you want.

I think I can answer my own question.  I've managed to get this to work using the maple-graded question type, formula answer, symbolic entry only (so that prime notation can be used).  The key seems to be that the maple-generated answer contain the operator D rather than the command diff.  For example, if you ask maple to differentiate sin(f(t)), maple will respond with cos(f(t))*diff(f(t),t).  But if you ask maple to differentiate sin(f(c*t)), then it responds with cos(f(c*t))*D(f)(c*t)*c.  You just need to substitute c=1 into the result. 

The following algorithm works for a question like "find the derivative of sin(f(t)), assuming f is differentiable":

$g=maple("sin(f(c*t))");

$ans=maple("subs(c=1,diff($g,t))");

This will enable students to enter their answer symbolically using f'(t).

@mschneider  thank you. . I did use Maple to generate MML but had not thought of doing Latex. That might be cleaner.  Much appreciated.

Here is a question that uses the letter "U" to formulate a union of two intervals to specify the domain of a function:

The question(.zip) can be downloaded here:  https://naitca-my.sharepoint.c...

***notes:  the question ignores annoying spaces the student might add into their response

This is what the question looks like:

I might suggest an animated 3d plot.  This way the object moves on its own to show all sides.  Animated plots will work with the plotmaple command.

@jmtrik

I am able to run the example you mentioned. However, this feedback is displayed only when the "How did I do?" option is used, otherwise, the text area remains empty after the answer is submitted.

Hi Nico,

Firstly, thanks for the effort in designing the nice questions! I would like to ask about +Quaterions_Rotation question, because of normalizing $k to get $u, the answer that the students need to enter is a decimal approximation. Are you looking to make that exact, or will you add tolerance so the student just enters correct to a number of decimal places?

I think the exact answers make more sense, so I would suggest putting certain variables in quotation marks or evaluating them using maple calls:

Here are two avenues of support:

Thanks,

Mark Schneider
NAIT

Updated basic template for linked answer boxes:  LinkedAnswerBoxes.zip