Hi experts, I used matrixplot for plotting B[n,m]. In B[n,m] I saved n->17 and m->17 values (so 17*17)...... when I use matrixplot(B,.....) I get the following error message: Error, (in plots/matrixplot) invalid input: `convert/Matrix` expects its 1st argument, M, to be of type {Matrix, Vector, Array, array, list}, but received B thanks a lot for your help!

Hi, have attached a worksheet with some question that I don’t know how to solve in maple. Yours Gustav Hjertén

Hi, i am new to Maple. I am having so much trouble right now...

I need to draw directions of eigenvectors. Can I get some help?

x'(t)=  A * x(t)

A is a 2x2 matrix.  First row 1   1    Second row   4   1

Thank you all.

I need to plot this. Help!!!!! I am stuck.

 

with(linalg):

A := matrix(2,2,[1,1,4,1]);

exp(A*t);

B := exponential (A, t);

c := matrix(2,1,[c1,c2]);

multiply(B,c);

x := t-> first row of the matrix above

y:= t-->second row of the matrix above

I need to plot x and y in this case. What do I do next ???? :(

 

I need to find the first local extremum of a polynomial function. For my purposes I need to start at 0 and go toward increasingly positive values of the independent variable. I also need to be able to specify whether I am looking for a maximum or a minimum.

Is there an easy way I can do this?

Thanks!!

David

I installed maple 12 as root user successfully. But sometimes simple command like
1+1 or any command takes a long time to complete. After a long delay maple
displays result. It's happening very often and it's annoying. I'm using Debian
Etch, kernel 2.16.8-custom.

Hi there, I am ultimately trying to solve a system of differential equation numerically that reads

diff(y(x),x,x) + (2/x)diff(y(x),x) + y(x)(1-(y(x))^2) = (F(x) - G(x)/x^2)
(1/2 - Xi(x))F(x) = -diff(G(x),x) - (1/x)G(x)
(1/2 + Xi(x))G(x) = diff(F(x),x) - (1/x)F(x)

Hi to everybody. I have to create a fortran output a lot of time for different polinomials.and CodeGeneration gives me an error. i give you a simple example to understand my problem:

restart;

  with(LinearAlgebra):

 with(CodeGeneration):

 np:=10;

 basex := Vector(np):

 for i from 1 to np do

    basex[i] := unapply(x^(i-1)-1,x);

 od:

 Fortran(basex(x),optimize,deducetypes=false,defaulttype=numeric);

Hi

How do I use Maple to create the following Euler circuit

I have already created the circuit now I would like to know how can I create it using Maple.

Please see the attached Maple file. View 1327_Euler circuit.mw on MapleNet or Download 1327_Euler circuit.mw
View file details

Hi to everybody. Im trying to use "solve" to find the coefficient that solve a set of equations(a set of polynomials).
 

> restart;
> with(linalg):
> with(codegen):
> M:=3;
> np:=(M+1)*(M+2)/2;  

I can not manage to figure out how to shade specfic regions under a normal curve. For example:

with(Statistics): X:=RandomVariable(Normal(0,1)): DensityPlot(X, range= -3..3)

I want to shade a region greater than or less than some X value.

Similarly, I would like to add a vertical line for some X value.

 

Thanks,

Rob White

 

 

Hi Everybody: I've a question about "convolution". How can I afford the convolution of different scaled functions?... In Example: F (2*X/T) in convolution with G ( X/T ) ? Is this equals to : Int ( F(2*w/T) * G((X-w)/T), w=-infinity.. infinity)? Am I wrong?... The particular problem is : Convolution of ( T*Triangle(2*X/T) ) with ( shah( X/T ) ), with Shah (x) = Sum( Dirac (x-n), n= - infinity.. infinity). Thanks for helping!

Hi there, I'm trying to plot a piecewise function. The problem is, the individual pieces are evaluated separately and maple seems to evaluate the numbers into square brackets.. As a result maple can't plot these, it can however plot it if I substitute the evaluated numbers and delete the brackets. Here's and example: > P := S[0]*(d+x)/(d-p); gives 10*([23/2]+x)/[8] and when I try either plot(p,x); or plot((10*([23/2]+x)/[8]),x) it fails however it can plot((10*(23/2+x)/8),x) any help would be awesome! thanks in advance

Hi I am trying to integrate the product of two matrices.  The independent variable is "x" and the constant is "L".  The two matrices are H and B.  I would like to integrate the two matrices on the x-domain from x= 0 to L.  Any help would be greatly appreciated.  Also I am new to Maple.  Is there a good beginner's book that would cover topics like matrix integration?  Thanks-Tom

H= [1, x, x^2, x^3]          (1x4 matrix)

Hi, would appreciate some help. Is there any command in Maple that would hep check general SARIMA equations? for instance, if we take the following model (0,1,0)*(1,1,1)_5, then the general SARIMA equation will be: (1 - K)*(1-K^5)*X_t = (1 + B*K)*(1+B*(K^5))*Z_t i.e. X_t - X_(t-1) - X_(t-5) + X_(t-6) = Z_t + B*Z_(t-1) + B*Z_(t-5)+ B*Z_(t-6) Is there any option in Maple that would allow me to check if this equation is correct? many thanx.