I am trying to create a procedure like this:
myproc := proc(x)
Digits := x;
sqrt(x)
end proc;
and then I want to plot the results like this:
plot(myproc(x), x=2..20);
However, I get an error: "Invalid assignment to Digits".
The following works fine, however:
seq(myproc(x), x=2..20);
How can I solve this?
Thanks.

How do I get maple to do polynomial long division?

It's obvious how to use Maple 10 for creating a document, but has anyone used Maple 10 for presentations? I'm going to present in a seminar in a couple of weeks and have some Maple demonstrations and graphics to show the group. I'd be interested in hearing tips, suggestions, experiences and ideas for presenting mathematical content to a group from within Maple. (I'm familair of course, with Powerpoint and LaTeX slides, and the LaTeX Prosper package. I'd use LaTeX/Prosper except that then I have to embed the Maple in the presentation. It would be more convenient if I can use Maple solely.)

Dear All,
First of all thank alec and Prof Doug. Please refer to post http://beta.mapleprimes.com/node/362#comment-729
My problem is to solve the following ODE with constrain given by the Eq:
> DEq := diff(f(x),x) = c1*sqrt( g(f(x)) - g(f(x=x1)) );
> Eq := ug - f(x=0) = c2*sqrt( g(f(x=0)) - g(f(x=x1)) );
> g(f(x)) := exp(f(x)-xn) +exp(-f(x)) +(1-exp(-xn))*f(x);
where ug is the independent variable and others are parameters
> c1 :=-257753830.552993398770016153893;
> c2 :=1.40376701562707174099362643812;
> xn := 35.4196679725860384893589519100;
> x0 := 0;
> ug := 40;
I have tried to followed alec's suggestion but the solution sometime still cannot be obtained. The independent variable ug has to be varied from -50 or less to + 100 or more. The intial guess in solving f0 (f0 := fsolve(g('fx0'(f0))-gfx0(f0),f0=30);) has to be input manually, this is a big drawback.

> Hello all,
> How do I export a Maple 3D plot to Povray 3.6 Win ?
> I use Maple 8.
> Some animations on my site http://www.artdigits.org
> Answer please to: avandergoten@skynet.be
> Thanks for the help !!
> Andre

In the third line of this do loop is the assignment assigning both the null set and the new value of the index into the original null set ? Also does this mean that the final set S contain the original null set with multiple null sets nested in it ?
>

What does "Warning, `delta_Ia_con_p` is implicitly declared local to procedure `inductor_current_RMS_AVG_p`" exactly mean?

I get this, when I execute the following procedure:

# art=0 returns RMS current and art=1 returns AVG current

> inductor_current_RMS_AVG_p:=proc(Ue,Ua,Ia,L,T,art)

>

> delta_Ia_con_p:=(Ue-Ua)/L*Ua/Ue*T;

> inititial_inductor_current_con_p:=Ia-delta_Ia_con_p/2;

> initial_inductor_current_p:=piecewise(Ia<eval(IaLG_boundary_condition), 0, inititial_inductor_current_con_p);

> # initial_inductor_current_input:=initial_inductor_current;

> inductor_current_increase_p:=initial_inductor_current_p+(Ue-Ua)/L*t;

i put system of eqn to dsolve (3) sol := dsolve([sysode, icsode]); and i am getting sol:= is it means that maple can't solve it?

i have a function f(q(t),...)= q(t)*sin(q(t)). i need to do df/dq(t). how? thank's

how do i count the numbers of elements inside of a list like [[x,y,z]]? ie. [[3,2,5],[2,34,6]]. i would want it to return 2.

Why do I get the same output with the two following statements
plot3d(0, 0..20, 0..70, color=proc(x,y) 200000*x end proc);
plot3d(0, 0..20, 0..70, color=proc(x,y) x end proc);
How does the option "color=proc() ..end;" works?
How can I choose the colors?
(The reason behind my question is that I am trying understand how to plot the Mandelbrot set)

i have a list in the form of [[x,y,z]] where x,y,z are integers, i want to find all the elements of the form [0,y,z]. how do i do that?

This is a screenshot of what I get when I open Maple 10 http://img226.imageshack.us/img226/5010/maple100fe.jpg (copy and paste url) The Maple Calculator also results in the same problem What Java programs are required for Maple 10? I have the Microsoft Virtual Machine installed as well as Microsoft SDK 4.0. I am running XP with SP2. Any help is greatly appreciated.

Why am I getting a false statement as output for this input ?
>
>

hi i am mechanical eng. student. i am new user of maple and i am useing maple 8. i need to do symbolic diff, diff of theta is theta dot. theta is function of t but i don't know it. i am building a def. eqn. with Lagrange equations. how i do it with maple?