Dear Maple helpers. Here a toy-version of my huge problems.

I want to do following:

1). Assuming (0 <a=1/2,  b=1/2, c=1/2)

I want  to plot (the surface of)  

f(x,y,z) = x^a * y^b * z^c   in the space (x,y,z) for

f(x,y,z)=50, 100 and 150, and with  x=0..40 ,  y=0..40, z=0..40

I tried with plot3d but it is not possible.  How could I do with Maple 14?...

I have a problem changing a maple matrix to a matlab code without getting the error

Error, (in PrintTarget) assigning to a long list, please use Arrays ( I don't know how to use arrays ) thanks Big in advance

Here is my code:

> J[p1] := Matrix(3, 4, {(1, 1) = -sin(theta[1](t))*`&Delta;x`[1]-cos(theta[1](t))*`&Delta;z`[1], (1, 2) = 0, (1, 3) = 0, (1, 4) = 0, (2, 1) = cos(theta[1](t))*`&Delta;x`[1]-sin(theta[1](t))*`&Delta;z`[1], (2, 2...

Integrals.mw

I tried solving the following equation but when i do i get

> solve((500*.87)*(1-(1/x)^.2385)-(288*(x^.3174-1))/(.85), x);

Warning, solutions may have been lost

Is it not possible to solve for highly nonlinear equations ?

Hola;

one short question:

 How to apply random permutations of data within an matrix.

 --Shuffle-->

It was mentioned in the post that Maple can not solve some oscillatory integrals, mainly this one

int(cos(log(x)/x), x = 0 .. 1)

int(cos(log(x)/x), x = .001 .. 1) is okay

but we find that when we go from 0.0001 .. 1 Maple endlessly evaluates.  It seems as soon as we hit that 4th decimal there appears a problem. 

int(cos(log(x)/x), x = .00001 .. 0.0001) won't work either.  Oh, this is...

i want to use numerical technique to solve non linear ode.

are there some built in numerical techniques in maple13.?

kindly name few and there syntax.

i have seen that we can solve linear ode numerically. how can i check that what technique does maple use?

Dear all,

I have functions f(x,y) and g(x,y).

How can I plot the dependencies of f on g for different x and y?

If I had only f(x) and g(x), than I could use plot[parameric] like it's shown in Help page

plot([sin(t), cos(t), t=0..Pi]);

I would prefer 2D plot, if possible.

Hello,

I want to use the values of the solutions of

sol := solve({x+y=a, x-y=b}, {x,y});

I would like to be able to continue some symbolic computationg, for example

dernier:= sol[1]/sol[2];

but I get an error message.

How can I take only the values of x (and not the expression x= something) to compute, for example "dernier"?

Thanks in advance,

Hi,

I have alot of figures but i have problem to convert the figure to latex. when i use export as eps, i get problem that the border of figure become inside the figure and the label of x, y for figure become outside.

when i remove the border of the figure. there is other problem when i convert to latex, the distence between the  figure and my writing very large.

 could you please give...

Hi,

Thanks for the reply; It was very close to what it is needed, but I have another question.

In that post, first a recursion is found using "listtorec" and then that recursion is solved using "rsolve"

Isn't there any way to generate the sequence from the recursive formula without solving? because solving is not necessary, as long as you have recursive formula and the base cases, sequence can be generated ....

//Mehrdad

Now I've joined the club too...

Attached file gives me this error when I try to open it: "There were problems during the loading process.
Your worksheet may be incomplete". Mads_Anthon.mw

I've looked through the source code but I can't find the issues. Can any of you guys help me?

Thanks you so much

Best

Mads

Hi,

I am a student from Sweden; Concerning a project about integer sequences, I have a question about Maple and Integer Sequence recognition.

I am trying to find a command in Maple capable of identfying and recognizing integer sequences as appear in IQ tests or any general form of integer sequences. For example, Wolfram Mathematica has a command named "FindSequenceFunction" as descibed here: http://reference.wolfram.com/mathematica/ref/FindSequenceFunction.html

Hello,

I'm having a problem evaluating an indefinite integral in MAPLE 14.  I am unfortunately unable to copy/paste the code in here, but the problem is relatively simple.

I have an expression as f(x,y) and am using the "expressions" (as opposed to "int" commands) to setup up the dbl integral.  When I run the code, it is only integrating with respect to one variable.  The answer is returned as the f(x,y) integrated...

Hi:  I need to reinstall my student copy of Maple after switching to a new computer.  How can I reactivate?  The Maple folks don't seem to answer support emails.  I seem to recall there's a secret link or trick way to ask them to reset their activation records server?  My old hard drive crashed and now I'm stuck.  Help!   Patti