Hi all,

I have to solve a ODE stated as follows:

PDE := expand(Laplacian(u(r, theta)) = M[r]/r)

But the problem is I don't know how to define M[r],  which is summ of "M[n]*cos(n*p*theta), where n is 1.3.5, 7...infinity

I f i write it precisely its  "summation of M[n]*cos(n*p*theta), where n =1.3.5, 7...infinity. 

Thanks in advance

A.Q

i have a sample but i dont understand what does makes, please help me ...

best regards

MaxVar(1,1)=evalf((1+RanNum(1,1)()/100))

my question is about the parentheses after the matrix RanNum(1,1), why is here ¿? what does makes ¿?

Good Afternoon.

I have a problem with that project, because the when i move the dial (DialKp1) the component Mathbase don´t update the lat change.

I don´t know how can i do for updating it?

23-06-2011-modelo_di.mw

Hi All,

I am trying to solve set of equations after applying boundary conditions.  There are 4 coefficients which I have to find by solving following 4 equations;

I tried to solve using the command solve({A, B,C,D},[E,F,G,H]), but it just returns [],  does anyone know which command to use for backward substitution of coefficients.  Also if I try to solve it separately, it says "recursive error"

Your help will be appreciated

Thanks

Hello, 

I am just starting to learn about maple.

I have a graph of two functions and would like to find the range that they agree within

 a certain percentage using fsolve() and format the interval as a list. 

The part that is throwing me off is the within a certain value part.  Thanks in advance!

I'm working on a 3D program that plots stars, star clusters and other objects of interest against a model of the Milky Way. The guts of this program create a few hundred points (< 2000) that represent stars, and move them a little bit in random directions to create a cloud effect. Then the animate procedure rotates them about the center of the galaxy. I would like to add more stars and do more things with them, but I am encountering a very sluggish editor, suggesting that Maple is imposing a memory limit. The Activity Monitor says that Maple is using 140 MB, so gigabytes of RAM remain available. Furthermore, if I save the plot as an animated gif, I can run half a dozen copies simultaneously in separate browser windows without encountering noticeable slowdown. But I can't elaborate the program without better performance from the editor.

The program is written in the Document interface. I tried saving it to the classic interface, but that didn't seem to help, and I found it difficult to edit.

Ideas sought.

I have a multi-equation vehicle model that I can set up as

> sol3 := dsolve([eqB, eqC, eqD, eqE, eqF, speed(0) = 0, V(0) = 0.7047824398e-1], [Tm(t), 

Tw(t), V(t), omega(t), speed(t)]);

or, following a MaplePrimes post

> sys := [eqB, eqC, eqD, eqE, eqF];
> ics := [speed(0) = 0, V(0) = 0.7047824398e-1, omega(0) = 0, Tw(0) = 0, Tm(0) = 0];
> vars := ...

I have a problem with radiobutton

i have 3 types of fricction, and each radio button has one type of it.

I have a problem when i select one type of friction don´t plot it

that is the code  RBFEstatica is a radiobutton of type static fricction

if GetProperty(RBFEstatica,value) = true then

DocumentTools[SetProperty](Label0,caption,estatica);

p1 := 0;
 p2 := 0.1;
 deltav1 := piecewise((abs(x2q1(t)) > 0 and abs(x2q1(t)) < 0), p1, p2);

Hello all,

Im trying to apply the working of the algorithm shown below to a more complex one(attached). The simple algorithm produces separate spreadsheets for different values of j. In the attached algorithm Im trying to produce different spreadsheets for different values of 'angle1'. I have applied the same structure but with no success. 

Can someone please have a look at my code and point me to my mistake?

Any help is really appreciated

Consider the simple loop below:

> for q  from 1 by 1 to 12 do;

> 
> if inter[q] <= B then xz[q] := inter[q] end if;
> 
> end do;

inter[1] to inter[12] is defined previously

B is also calculated beforehand.

My problem is that Maple insists on looking for inter[13] and xz[13]. My range is between 1 and 12 so Maple shouldnt be doing this.

Hi all,

I want to save a plot into Array or other and re-plot it by pointplot.

restart:with(plots):

f:=x->cos(x)+cos(x)^2;

plot(f(x),x=0..2*Pi);

With Array, I want to determine dx (step) of the plot (Array) and the dimension of Array (number of line and column).

If Pk:=plot(f(x),x=0..2*Pi); is Array, I can reproduce the plot as:

ef := {seq([Pk[i,1], Pk[i,2]], i = 1 .. N)}: # Pk[i,1] is x and Pk[i,2] is f(x), N number of line of Array

I would like to do the following.

Ive got variables a(z) where z(tau). Now I would like to do something like:

>> t = z(tau);

>> a := a(z);

>> diff(a,tau);

  == (da/dz)*(dz/dtau)

Hi,

I have the function:

restart: with(plots): with(OrthogonalExpansions): with(DiscreteTransforms):

f:=t->piecewise(t<0,0,t<1,t,t<2,2-t,0);

The Fourier coefficients a[0], a[i] and b[i] can be calculated by:

T:=2: Trig:=FourierSeries(f(t),t=0..T,n,'Coefficients');

a[0]:= op(1, Coefficients);a[i]:= op(1, op(2, Coefficients))[1];b[i]:= op(1, op(2, Coefficients))[2];

I want to calculate those coefficients a[0...

Dear All,

I'm a beginner who is learning Finite Field under the help of Maple. I'm wondering is there a command to compute the minimal polynomials for the members of a finite field?

For instance, for GF(16) realized by the polynomial a^4 = a + 1,we know that for a's minimal polynomial is x^4 + x + 1, a^3's minimal polynomial is x^4 + x^3 + x^2 + x + 1. In Maple, how do I reproduce such result?

Thank you very much for your help,

Best,

Kelvin

Good afternoon

I don´t know if a principal worksheet in maple can call other secundary worksheets.

Please help me. I don´t know the code, or function