What does it mean when I get the message, "Warning, model is not of full rank"?

Thank you.
Janice

Hi all,

Is there some way i can find the width of a plot?

I have the equation below:

Prob:=(w,T)->(B^2)*(sin(w*(T/2))^2)/((w/2)^2);

plot(Prob(w,6),wf=-3..3);

Which produces a gaussian looking plot, the plot reaches zero at some...

mem2.mw

Although i have defined K5 as a constant before solving the equations , maple returns an error message saying that

"Error, (in fsolve) k5 is in the equation, and is not solved for"

And i am alos trying t find the roots of the equations in a certain range as specified above.

Dear all,

Find here a part of my precedent post "2D finite element method" which represent a worksheet for 2D triangular Mesh.A part of the mesh can rotate with regard to the other by modifying theta.

restart: with(geometry): with(plots):

ms := 8: n := 6: mr := 5: theta := (1/180)*(23*Pi):

wrs := (1/1000)*<30.8, 33, 36, 39, 40, 43, 46, 49, 53.25>:

wrr := (1/1000)*<20,23,26,28,30,30.8>:

wt := (1/180)*Pi*<0,10,20,30,40,50,60>:

Dear All!

Could you explain how the coulditbe() function works?

> assume(q, integer, w, integer); about(q, w); coulditbe(q/w < 1); coulditbe(q < w);
Originally q, renamed q~:
  is assumed to be: integer

Originally w, renamed w~:
  is assumed to be: integer

                              FAIL
                              true

BR,

Zoltán Faigl

In a theme similar to the movie Matrix a little procedure to create falling random number animation, and in this example 0's and 1's hence the name binary rain.

MatrixRotaterows := proc (arows, bcolumns, randstart, randend, iterations) 
local a, i, b, c, d, e, f, g:
a := Matrix(arows, bcolumns, 0):
for i to iterations do
  b := Matrix(1, bcolumns, rand(randstart .. randend)):
  a := ArrayTools:-CircularShift(a, 1, 0):
  a[1,..] := b:

Good Morning.

I have problem when i want to graph my equations. I received this error: 

Error, (in plots/odeplot) curve is not fully specified in terms of the ODE solution, found additional unknowns {t}

I would like to know how i can solve it

Thanks in advance 
 

Dear All,

I ran into a problem, which I can not resolve. 

> Eqs := [x*0 = y*0]; Vars := [x, y];
                            [0 = 0]
                             [x, y]
> solution := solve(Eqs, Vars);
                        [[x = x, y = y]]
> Eqs := [x*b = y*b, b = 0]; Vars := [x, y];
                       [x b = y b, b = 0]
                             [x, y]
> solution := solve(Eqs, Vars);
                               []

Hi, my professor wants our graphs to be labeled (which is reasonable). How can I label the graph I made this way:

>inequal({x[1] >= 0, x[2] >= 0, x[1]-3*x[2] >= -3, 2*x[1]+3*x[2] <= 6}, x[1] = 0 .. 3.5, x[2] = 0 .. 2.5)

Thanks.

Hi all,

I noticed that there are not many applications which deal with the finite element method with Maple. I attached in the file below a code for the magnetostatic probems and which allows the calculation of the magnetic field in a permanent magnet synchronous machine.

mafem.zip

I hope this work will help many users of maple in the numerical analyzis with the finite element method

I posted...

Hi,

I am trying to solve for the 2D temperature distribution (heat flow) through a brick, using finite element analysis.  I created a 341*341 matrix for each nodal equation, and a column vector that is the solutions to each equation.  I want to find the temperature at each node using A^-1 * B or LinearSolve(A,B).  My problem is that when I do this the entire solution vector is 15.  I have a constraint where the bottome nodes are all at 0 degrees. ...

I have an array of 2 vectors in a do loop, the vectors being i (path number) and j (time).

i goes from 0 to ntime, and j goes from 1 to ntime+1.

The array is called Spot[i][j] and i need to find the average of this array but dont know how.

Any help would be appreciated!

Thanks!

Hello

Can anyone help me  please in how to compute the Big oh in this example?

since I didn't get any exact solution.

The AddVertex command (in GraphTheory) does not seem to copy any attributes that were set in the original graph.

with(GraphTheory):
G := CompleteGraph(5):
SetGraphAttribute(G,"graphAtt" = 1);
SetVertexAttribute(G,1,"vertexAtt" = 1);
SetEdgeAttribute(G,{1,2},"edgeAtt" = 1);
H := AddVertex(G,6):
GetGraphAttribute(H,"graphAtt");
                     ...

Hi guys,

I would be ever so grateful if someone could asssist me with the following matter.

I am trying to integrate the following expression but maple does not seem to be able to do it directly

Int((1/(2*Pi) + Q* cos(k*phi))^2/ (1+ beta^2*((1/(2*Pi)) + Q* cos(k*phi) )^2),phi=-Pi..Pi);

So I convert the expression to an exponential form as follows and evaluate that

 numerator:=(1/2/Pi+Q*(1/2*exp(I*k*phi...