I have install Maple13 and GRTensorII on my PC (Ubuntu12.04) ~ but GRTensor dosent work ! When i start Maple13 ,there are the words "Error, "/home/herb/.mapleinit" is an empty file". 

Is anybody can help me out of it? I really have done the following in README:

3. Go to the INSTALLDIR. In this directory you will find a file called
 mapleinit.sample. This is a Maple configuration script which has

I am Beginner in maple , i cannot see why while this function cannot be defined at x=1, but the graph is plotting fine and continuesely in x=-2..2 ?!

and with this one we get another graph and yet different one !

sin((1-x)^0.5)/(1-x^2)^0.5

Can anybody explain to me why , your help will be appreciated !

 I need help to plot  a sequence of the form given in the attachment below     

seq.docx    

As usual I am going to use this blog post to complain!
How can anyone in their right state of mind create a Finance Package
with out procedures for return calulation ie first difference, percentage change, log returns etc

Hi,
I'm trying to import matlab function from m-file.

File looks like this:

    function out = xxx(omega)
    out = heaviside(omega);

It's only heaviside function.

And now, when I'm using "FromMFile" command in Maple it doesn't recognize Heaviside function. It imports that function as "heaviside" - witch small first character (in Maple we needs big "H").

Any help? 

thx 

I am trying to write a script that will read in vector files using ImportMatrix, perform a simple calculation then output a matrix file using ExportMatrix.

The difficulty I am having is that I would like to do this on a number of files,

eg.

for i from 1 to 600 do

Mi:=ImportMatrix(rowi):

do calc....

ExportMatrix(matrixi,Mi):

end do:

The variable i is in italics...

I want to model this game (I want an ensemble average and a time average)

50% chance you get head=win 50%
50% chance you get tails= lose 40%
Starting capital =100

First of all I need a very large binary matrix(1..100000,1..100000) however not
even that I can do fast enough in maple!

I tried:

rtable(1 .. 1000, 1 .. 2000, frandom(0 .. 1, .5), subtype = Array, datatype = float[8], fill = [0, 1])

it is somewhat fast but it does not do what I want ie binary ...

I'm trying to solve the following

> de := proc (omega, l, M) options operator, arrow; diff(y(r), `$`(r, 2))+(2*r-2*M)*(diff(y(r), r))/(r*(r-2*M))+(omega^2*r^2/(r-2*M)^2-l*(l+1)/(r*(r-2*M)))*y(r) = 0 end proc;

How to use maple get the nth term of sequence A: 7 + 77 + 777+ ... to n terms.

please help me!!

Thanks!

I am trying to fit some data to a model.

The model is given by this equation.

A*(C/B)^(2*B)*(B-1)^(2*(B-1))/(205*10^9*(2*B+1)*(sigma^2-(650*10^6)^2)*sigma^(2*(B-1)))+(C-sigma)^2*A/(205*10^9*(2*B+1)*(sigma^2-(650*10^6)^2))

> with(Statistics);
> X := Vector([819.4, 795.6, 788.8, 782.0, 776.56, 763.64, 748.28, 724.42, 717.40, 711.28, 707.20, 680], datatype = float);
> Y := Vector([5.3*10^4, 7.8*10^4, 9*10^4, 9.5*10^4, 10^5, 1.2*10^5, 1.37*10^5,...

hello,

I have been asked to show that the parametric representation of this curve is given by 

x(t)=cost/1+sin²t and y(t)=sintcost/a+sin²t.

The curve is defined by (x²+y²)²=x²-y² 

The polar representation of this curve is given by r²=cos(2theta)

Help!

Thankyou

I need to make one "DensityPlot-point" (similar Statistics [DensityPlot] or histogram in 

Matrixplot) of a set of points (x, y). 

The set of points (x, y) was generated by the procedure.

Is there a way to generate it?

Thank you.

Thank you for Assisting me to solve the PDE, Now please would you tell me what F5 means (in other words, explain to me the solution) and also could you how to test if the solution satisfies the initial and boundary conditions.

Please help me plot the graphs of the following equations:-

eq1 := diff(E[X(t)], t) = lambda-delta*E[X(t)]-beta*E[X(t)*V(t)];

 eq2 := diff(E[Y(t)], t) = -delta*E[Y(t)]+beta*exp(-rho*tau)*E[X(t)*V(t)];
                                                    
eq3 := diff(E[V(t)], t) = gamma+N*kappa*E[Y(t)]-mu*E[V(t)]-beta*E[X(t)*V(t)]

NB:- E[X(t)]= the expected value of variable X at time t. 

Please help me know how to input this...