Hi! I'm using CodeGeneration for a vector which has 5 dimions, like v:=Vector([v1, v2, v3, v4, v5]). When I try to use Codegeneration there's the following error:

> C(v);
Error, (in _CGLanguageTable:-Module:-GetFast) index must evaluate to a name when indexing a module

What's that supposed to mean?

Can one create applets in Maple like one can with Java?

Can one create an interactive dialog box, as simple as one can make it,

whereby one can click on a radio button among a finite set of options

and enter a number into a text field, and output another number?

If yes, then how?

Secondly, can one convert one's Maple program into Java for others to use,

who may not have Maple, if one wants to put it up onto the web?

I'm trying to print a nice looking array (6 columns with various numbers of rows) from an array that storing the data with 5 indices.  Here's the code:

P[i,j,p,q,k]:=(W[1,i].W[1,j].W[1,p].W[1,q]=W[1,k]);

Hello Maple experts,

I am preparing a little package for Maple for which I would like to set the Digits variable to the maximum possible value with hardware floating point evaluation. I know that this is done with

Digits := trunc(evalhf(Digits));

However, as advertised in the help pages, a change of the Digits variable won't persist when done inside a procedure. When preparing my package I can specify some 'setup' commands that are executed when loading the package but changing the Digits setting seems to be impossible...

Hi,

I wondered if you would be able to help.  I've set up a for-loop that substitutes values of b into a given function (dependent only on b).

When substituting the values of b into the function f the values of f decrease to a point and then the values of f begin to increase.  I want to establish the interval in which this change occurs, i.e. the minimum of the function.

Below I have included a code similar to our situation:

Hello, I would like to perform some formal computations with non-commutative

variables in maple (Lie-bracket and further) in order to define Lie algebras structures;

any idea about how I could "detype" the commutativity assumed upon the variables?

Thank you for your help!

from an fsolve where I solve 2 variables (fout and u2)  I get get this anwer.

ddmax := {fout = 0.3873538368e-1, u2 = 9.708916648}

However they are not allways in the same order, somethimes u2 is listed first. So how can I determine which value is listed first.

Thank you for any solutions to this.

M.

A rather fundamental I expect but I have tried reading the help file and cannot understand it - apologies if that makes me rather dim.

I have some data points (not a function) which I would like to plot.

If I simply use plot then the points are joined by straight lines - I'd like it to be a curve. Having looked at this forum I found a post which pointed to the curvefitting help page but I've looked there, tried a few things but failed to plot anything.

I have these three functions:

Phi := proc (z) options operator, arrow; z^(-(1/2)*alpha)*(BesselJ(alpha, 2*sqrt(lambda*alpha*z))-BesselY(alpha, 2*sqrt(lambda*alpha*z))*BesselJ(alpha, 2*sqrt(lambda*alpha*a))/BesselY(alpha, 2*sqrt(lambda*alpha*a))) end proc

w := proc (z) options operator, arrow; alpha*z^alpha end proc

Hi

I founda something strange here:

diff(y(x),x$2)+4*y(x)=cos(2*x);

dsolve(%,y(x));

y(x) = sin(2*x)*_C2+cos(2*x)*_C1+1/8*cos(2*x)+1/4*sin(2*x)*x

that's the answer maple give me when i run it for the first time

take a look at the two cos(2*x) tern?

shouldnt that be just ONE constant times it?

ok then if you run it again

somtimes it can collect them together give you single cos(2*x) term with ONE constant

EI {dy(x,t)/dx } +CA{d y(x,t)/dx}= summation of (F_o (sin(5nvt/r)sin(nwt)))  from n=1 to n= infinity

the derivative here are partial not ordinary

where EI, CA ,F_o , v ,r and w are constants 

Hi guys,

What is the exterior product of

       1  0  3  0

 A=(                 )

      -2  3  1  4

       1  4  -2  2

 B=(                 )

      3  2  0  4

written as A^B?

Hi there,

does anyone know how to write standard multicolumn numerical data sets generated by a "for" loop into an array of data files with names "dataset%.txt", where % is iteratively given by the value of the loop index? Thanks a lot. 

hi,

how do i solve the following?

restart:

ode:=diff(y(t),t$2)+y(t)=piecewise(t in [0,Pi],t, t>Pi,Pi);

ics := y(0)=0, D(y)(0)=0;

dsolve({ode,ics});

Thanks

Hi everybody,

I'm not really sure of where sould I post my question.

Let me explain my problem :

I've got a convolution product of my function f and my filter called G (let say a gaussian for example, or a top hat filter). It is as follows :

filtre:=proc(g);
return x->(1/(2*Delta)*int(g(t),t=(x-Delta)..(x+Delta)));
end;

filtre:=proc(g) local a,G;
G:=x->sqrt(gamma/(Pi*Delta^2))*exp(-gamma*x^2/(Delta^2));
return x->int(g(t)*G(x-t),t=-infinity..infinity);
end;