Maple Questions and Posts

These are Posts and Questions associated with the product, Maple

Dear all,

 I want to plot  one figure,  the codes in Maple 11 is as follows

I'm using a Mac Pro with Leopard, Maple12, and try to

use "define_external" to use a shared library I created (just a simple trial for now) but get the error:

> define_external('try_it', 'FORTRAN' , 'x'::float[8] , 'y'::float[8] , LIB="try/");
Error, external linking: error loading external library try/ dlopen(try/, 129): no suitable image found.  Did find:
    try/ mach-o, but wrong architecture

I compiled the library with:

Maple's Standard GUI has context-sensitive menus. Those are the menus that appear when one right-clicks on a output (or input, in a Dcoument).

Those context-menus can be customized.

Below is an example which adds a new submenu. The new submenu is populated automatically according to the types of thing found within the object itself.

It's an alternative to a menu-item that already exists, which shows up as "Help on Command". But that existing item only...

One way to enhance a package is to add to Maple's context-sensitive menus  some new menu entries which utilize that package's features.

In Maple's Standard GUI, context-sensitive menus (a.k.a. context-menus) appear when the mouse is right-clicked over (input or output) 2D Math expressions.

For a package implemented as a module, new and relevant context-menu entries can be created inside the module's ModuleLoad export. That will cause the new menu entries to be created (automatically...

Hey guys,

I have a quick question about solving for variables = infinity.  When I code in


the output returns as blank.  Does anyone know why this is?  When I do

the output returns x=infinity and y=infinity.  But when I do



I'm trying to solve a system of 3 equations with 3 unknowns using fsolve(). The (very long) equations depend on a parameter d. For some values of d, fsolve finds a solution, for other values of d it doesn't, although I can specify a quite narrow range in which there should be a solution. Is there any way to force fsolve() to try harder? It returns unevaluated after about 5 min and I wouldn't mind if it searched for several hours...


Dear all,

A few months ago I posed a question on drying of moist particles. Since then my study continued but has never finished.

In short:

Can someone help me with figuring out what the following error means:

"Error, (in F) final value in for loop must be numeric or character"

I've obviously done something wrong but have no clue where to start!!

This comes up when i'm trying to plot a graph using the following code:

Hey Everyone,

I'm a Calculus III student and first let me say i love maple because it really helps to visualize things, however, i'm having trouble plotting an equation.  I'm doing a 2nd degree taylor function for sin(x*y) which is:

z = 1 - (pi/8)(x-1)-(pi/2)(x-1)(y-(pi/2))-(1/2)(y-(pi/2))

And it says that it cannot plot the equation.


I've also noticed that the plot of sin(x*y) is different from the plot of sin(x(y)).




I want to plot a graph of the following sequence

x[n]=p*x[n-1]+q*x[n-2] where x[0]=0 and x[1]=1. Also p & q are independ random variables with values +1 or -1.

This is what i've done so far

> with(Statistics):
> x[0]:=0: x[1]:= 1:
> for n from 2 to 10 do
> S:=Sample(Bernoulli(0.5),2):
> p:=S[1]: q:=S[2]:
> x[n]:=p*x[k-1]+q*x[k-2]: od;

But the output is not tallying up the x[n]'s. Also i just realised my code selects +1 or 0 for p & q......


Hey there,


the attached worksheet shows you how to master definite integrals using special tools that help you determine the pattern between antiderivatives and the area under a curve.

You can also view the examples done in an interactive video:

(Ctrl+click on link)

Definite Integrals - Video Tutorial


Hi everyone!

Say I have a simple expression in command line Maple that would become a float as soon as it is executed, e.g., 2^(.5). Is there any way I can keep this in symbolic representation by somehow suppressing the seemingly-automatic conversion to a full float? What I'm really looking for is something that would allow me to do this:

input: u := 2^(.5): convert(u,rational);

output: 2^(1/2)

Thanks for your time!

Is there any way to show the page limits in my document!?!? simple question

I would really need it!!!


Thanks a lot!

Can somebody please help me with this. I cannot figure out how to make this work? I keep getting the following error: Error, (in treach) cannot determine if this expression is true or false: 17

in maple 11, i have two problems with simplification of powers of "negative" variables.


problem i: A^(1/2) *A^2 <> A^(-3/2)*A^4

the two following expressions should be equal but differ by a minus sign:


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