MaplePrimes Questions

I have a procedure



end proc;


When I type  

smth(Pi);       or     smth(pi);    

I obtain the error message

Error, invalid input: smth expects its 1st argument, T, to be of type positive, but received pi

How can i give the Pi/pi to T  if I want to keep  the T::positive  ?

(evalf is not acceptable.)



Dear All,

I'm creating matrix questions and wish to dynamically set the size of the matrix. So I'm trying something like this:

\qutext{Find the transpose of the matrix $$A=\left[\begin{array}{ccc} 1 & 2 & 3\\ 0 & 1 & -2\end{array}\right]$$}




But this doesn't seem to work.





Dear All,

Whenever I import a question bank I get the following error:

Error Message:

Errors loading the question bank, first : Reason: Error at line 0. Stream closed

However, the question bank seems to have imported correctly. Any thoughts?



How do I add a new line in the middle of an existing execution group without using split/join commands in Maple 11.



What is wrong in here, please help:


dustplot0:=(points)->odeplot(duffing, [x(t),y(t)], 0..(2*Pi*points), numpoints=points);
plot1 := dustplot0(100):

plot2:=PLOT(POINTS(op(op(1,op(plot1))),COLOUR(RGB, 0, 0.2,0.5),SYMBOL(POINT))):
Error, invalid input: op expects 1 or 2 arguments, but received 3

I do not understand the reason for this error.



My problem is that Maple does not give answer at all for the initial value problem, so I need a help. If does exist a solution how can I obtain it?

Thanks in advance,  Sandor


What is the (symbolic) equivalent in Maple for

   [ V  D ] = eig( A, B, 'chol' )

for given matrices A, B ?


I was trying to install Maple11 on my computer (Windows Vista Home Premium, 2GB on RAM) but I cannot do it, when I executed maple11windowsinstaler.exe appear this message:  "Installer user inferface mode not suported": Unable to load and to prepare the installer in GUI mode... Why appear?? I need to intall maple as quick as possible. I tried to run the installer with  "run as administrator", but i cannot install.

Please, help me!!!! =(

Hi, I am just courious and I want to delay the output like: If I ask maple to do an integration, first it displays the question: Int(x,x); then after some time it displays the answer int(x,x); is there a way to do that?

I'm a teacher and I'm teaching my students about graphing trig functions. Well, they do not know about radians yet and I need to keep everything in degrees and would like to plot my graphs in degrees and show that the graph is in degrees on the axis, but I can't find a way to do this. Can anyone help me with this!




I am trying to convert tan(z) to sum form using the convert(...,Sum) command and using some information from FunctionAdvisor.
The second operand of FunctionAdvisor( sum_form, tan) gives me the domain of validity.
I would like to use this info during the conversion as assumption, but it doesn't work for me.
(Of course, the first operand is the required sum form, I am just playing with maple).
Here is my problem:

Unfortunately piecewise() is a builtin so I can't see the library code.

I'm trying to construct a sequence of arguments to piecewise() programmatically, and to assign the result to a function but I just can't seem to set it up correctly.

I have a 10x18 matrix, each row of which will be used to define a piecewise linear function, so the columns in a row define the endpoint values of each line segment.

Essentially what I'm trying to do is the following (giving some Maple pseudo-code which doesn't work, but hopefully will get the idea across):

On page 99 of Dr. Euler's Fabulous Formula, Nahin says that:

int(int(`f`(s), s = 0 .. t), t = 0 .. x) = int(`f`(s)*(x-s), s = 0 .. x)

is true and I believe it, but I can't get Maple to confirm it.  How can I get Maple to agree with Nahin?  Are there assumptions that will make it happen?



I want to evalute in degrees.



sin(45 * deg);  # it works


>alpha[1]:=4.25 * deg;
> theta[1]:=11.31 *deg;
> theta[2]:=78.69 *deg;
> alpha[2]:=-9.25 *deg;
> a:=1400.00;  #  a and b should be real values
> b:=509.90;


Error, (in Units:-Standard:-+) the units `arcdeg` and `1` have incompatible dimensions

not working...

How to input the character underline('_') in Maple,for example,typing variable name "cs_e"?

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