## how to make animations using contour plots...

Hire There: I am trying to make a contourplot animation of the function u(x,y,t)=exp(-Pi*Pi*t)*sin(2*Pi*x)*sin(2*Pi*y),defined in [0,1]X[0,1] I tried this a := proc (t) densityplot(proc (x, y) options operator, arrow; exp((-1)*Pi*Pi*t)*sin(2*Pi*x)*sin(2*Pi*y) end proc, 0 .. 1, 0 .. 1, axes = frame, style = PATCHNOGRID, colorstyle = HUE, numpoints = 6400) end proc display(seq(a(t), t = 0 .. 1), insequence = true, axes = framed); but it seems that it is not working I really appreciate your help

## Dirac Matrices...

Can anybody tell me, How to use Dirac Matrices (Direct products of Pauli Matrices) in Maple?

## Measuring Maple with Macros

by: Maple
This book entry describes a method, using text files and preprocessor macros, to measure the timing and memory usage of Maple procedures. Attached are the source code and compiled library for a small Maple package that does the actual measurements.

## How do I make a function dependant on a variable...

I would like to define J=(y1-y10)^2+(y2-Y20)^2+k*(u1)^2+k*(u2)^2 where y1 is a function of u1 and u2 y2 is a function of u1 and u2 then I need to diff(J,u1), diff(J,u1,u2) Thank you for your support Don

## Having a bit of trouble integrating this one...

Hi guys, I am trying to integrate the following expression: u_ratio:=(4/omega_star)*(sin(omega*t)-(exp(-B)/sqrt(r_star))*sin(omega*t-B)); where omega_star:=omega*r0^2/nu; r_star:=r/r0; B:=(1-r_star)*(sqrt(omega_star/2)); I would like to obtain integral of u_ratio with respect to r_star, and separately the integral of u_ratio over one period. When i try to use something like int(u_ratio,r_star) in only get back a large expression with an integral symbol still in it. What would be the best way to approach integrating this guy? Thanks, Randy

## How to finding alpha(n) of this system equation(He...

How to finding alpha(n) of this system equation finding alpha(n) whan n=1..3 cos(alpha(1))+cos(alpha(2))+cos(alpha(3))=3*pi/4; cos(5*alpha(1))+cos(5*alpha(2))+cos(5*alpha(3))=0; cos(7*alpha(1))+cos(7*alpha(2))+cos(7*alpha(3))=0; so.. i am basic maple user.herry herry.

## AXESTICKS and lines...

After some experimenting I found that using AXESTICKS forced the use of POINTS (more or less) and PLOT. The problem is that I would like to draw a line instead of points.
I am trying to generate normal probability plots to be used for comparing different cases.

Ray

## Eliminating variables from a set of equations...

First time posting here, hoping to find some help, and I may try to help others. I have a set of 8 equations. Each of the 8 equations are in terms of two variables. For example: x1 = f1(theta1, theta2) x2 = f2(theta1, theta2) x3 = f3(theta1, theta2) x4 = f4(theta1, theta2) y1 = f5(theta1, theta2) y2 = f6(theta1, theta2) y3 = f7(theta1, theta2) y4 = f8(theta1, theta2) the functions f_j are not neccesarily linear and are fairly complicated with many factors. I need to remove (eliminate) the theta1 and theta2 terms from the set and be left with a new set of equations that is in terms of x_i and y_i.

## How to coding such kind of function (Convolution)?...

Hi all: I want to realize the following function in maple: 1> According to the input vector, n, canculate the n times of auto-convolutions, after getting the final result, measuring the vector according to each element of the result. If I use the math language, Suppose I have vector, called A the length of vector is L; Result = A*A*....A (n times convolution); Measure= Sum (on i) (Result[i]*ln(Result[i]); I donot know how to coding like that Thanks for any help. How to read the parameters from keyboard in maple? Thanks bin

## Maple output...

I am trying to compute some Lie brackets in Maple but am having trouble with the output. The first five few terms that I computed are small enough that they will display with pretty print. However, the sixth term gave me the error 'Large output of more than 1000000 nodes' and it couldn't display. I turned pretty print off and eventually got it to display the sixth term but now I can't get the seventh or eighth terms to display even with pretty print off. Every time I try to output the expression for the seventh or eighth Lie bracket Maple just stalls out. Since it can compute the terms that I need but not display them is there a way I can export the hidden content to a text file or some other format so I can copy and paste the equations into Matlab?

## Plot into a data file...

Hello everybody: I need to know how to export or create a plot directly into a data file (i. e. .dat or .csv) to pick it up with Origin or something like that. Thanks, L.

## Printing Output and Proc...

Using the proc command and multiple functions embedded in a main function, I'm trying to calculate something. However, I don't want a huge list of calculations to be printed out. I realize that using : instead of ; eliminates most of those outputs, and I've set printlevel := 0;, but I am still getting printouts every time I run an embedded proc inside my main calculations. I was hoping there would be a way to make it so nothing is printed out at all excluding the final return value of the main function (specifically, how do I eliminate the output of the embedded proc's). Thanks, William