## How to disable popup window on system calls in OS ...

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I'm a new Maple user with an installation of Maple 10 on mac OS X. I'm trying to make system command calls so that I can convert eps files to to pdf using system("epstopdf foo.eps") This works, but Maple insists on putting the result in a popup window which I then have to manually click to close. Does anybody know how to disable this? Also, how could I get the resulting text output from a system call so that I can manipulate it in Maple. Thanks! - Mark

## Plotting enclosed volume...

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I want to plot the volume that is enclosed by the following four areas: x^2+3*y^2=z z=0 y^2=x x^2=y I got so far that my plot looks like this .

## graphing system of ODE...

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I have a system of ODE that I am trying to solve...which I have...and then graph the results for the 3 variables (S,P,Q) vs. t on the same graph. Here is what I have so far... pds := dsolve([pdeu, pdev, pdez, S(0) = 100, P(0) = 1000, Q(0) = 50], [S(t), P(t), Q(t)], numeric) Which I am not sure what to do with, I do get values. I have tried to set up an array and graph from there but it isn't working out. I have also tried... > DEplot([diff(Q(t), t) = alpha*S(t)-mu*Q(t),diff(S(t), t) = b*P(t)*S(t)/N-(mu-alpha)*S(t),diff(P(t), t) = mu*N-b*P(t)*S(t)/N-mu*P(t)],[Q(t),P(t),S(t)],

## how do i use Maple to solve for "a" help~~...

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eqn :=-p*(l^2-a^2)^(3/2)+a^3*q; l is letter not number if want to find a .....a =??......plz use maple to find the answer i use hand to do it, so the answer is a = (p^(1/3)*l)/sqrt(p^(2/3)+q^(2/3)); but i use Maple it gave me different answer.... so plz help!

## Two questions plots and importing...

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I am using Maple 10 to do write labs for Physics class and every time insert a MS Excel into Maple it puts the bracket on the left side, is there anyway to take the bracket out? How do I make plots come up in their own window?

## Integration...

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Hi, friends. Could you please have a look on this Integral and let me know any suggestion for solving? J:=int(exp(-I*a*x)/cosh(k*x),x=0..theta); where a, k and theta are real constants. cheers Sayed

## Why my MAPLE program gives different result everyt...

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This is a program discribing the dynamic behavior of a N pendelum system. When I tried to comparae the result of different initial conditions, I found that every time i run it, the graph will be different.

I know that double pendelum system is a typical chaotic system, is this the reason why i have different result for each time?

Here I attach the file, but plz rename it to ***.mws file before run, b/c i wrote it in maple classic worksheet.

> restart:
interface(warnlevel=0):
with(SolveTools):with( plots ): with( plottools ):
with( DEtools ): with( PDEtools ):
g:=9.81:
x[0][2]:=0:
y[0][2]:=0:
#initialization function of each beam,in this function, we should give 3 variables, n=the number of this #beam, la=the length of this beam, ma=the  mass of this beam,q=the initial angle of the beam,and qt=the initial angle velocity of the beam
beams:=proc(n,la,ma,q,qt)
global l,m,x,y,theta,icq,icqt:
icq[n]:=theta[n](0)=q:
icqt[n]:=D(theta[n])(0)=qt:
l[n]:=la:           #length of  beam n
m[n]:=ma:           #mass of beam n
#initialize the positions of each beam
x[n][2]:=0:        #the x position of the end point of each beam
y[n][2]:=0:        #the x position of the end point of each beam
x[n][1]:=0:        #the y position of the center point of each beam
y[n][1]:=0:        #the y position of the center point of each beam
end proc;
#define the forces that applied on the end of  beam n
Force:=proc(n,fm,fn)
global fx,fy:
fx[n]:=fm:
fy[n]:=fn:
end proc;

## Use of Heaviside Function...

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I'm having difficulties in using the Heaviside function in Maple. My heaviside function is (t-tau), and I'm having trouble integrating tau from zero to t. After integration, the expression still shows an integral. Is it because when tau = t, the heaviside becomes zero? Any and all help is appreciated. Attached is the actual sheet. The 2nd to last and last steps are the steps or concern.... **** This problem has been overcome *****

## Dumb Question from Maple Noob about Lists/Array cr...

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How do use an equation to create a list/array?

e.g y=x*5+1

for x from 0 to 1 in increments of 0.1

answer should look similar to:
[0,1]
[0.1,1.5]
[0.2,2]
[0.3,2.5]

## diff eq.......

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Dear Maple user(s), I have the next problem, hopefully you can help me: I have two Diff. Eqea. 1) diff(w,x,x) = -a*diff(w,y,y) 2) diff(w,x,x,x) = (a-2)*diff(w,x,y,y) a=constant Now, I need to know: w=f(x,y) How do I solve this in Maple, do I maybe need more conditions to solve this? Regard, Michel

## Bootstrap...

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Has anyone been able to use the statopts option in the Bootstrap command which is in the Statistics package in Maple 10? Note the following sequence of commands > with(Statistics) > Bootstrap('Mean', [1, 2, 3, 4, 5], replications = 6, output = array) print(Matrix(1, 6, {(1, 1) = 2., (1, 2) = 3.39999999999999990, (1, 3) = 2.20000000000000016, (1, 4) = 2.79999999999999982, (1, 5) = 3.60000000000000008, (1, 6) = 2.20000000000000016})); [2., 3.39999999999999990, 2.20000000000000016, 2.79999999999999982, 3.60000000000000008, 2.20000000000000016] According to the documentation which is attached as a PDF file it appears that this command should work.

## Table lookup...

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Does any body know if there is a function like interp1 available in Maple or at least what is the easiest way of establishing a look-up function in Maple. I have a n*2 matrix of data (x, and f(x) in each column) and I would want to interpolate data from this matrix. This is actually one of the applications of interp1 function in MATLAB...

## Apollonius (Geometry)...

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I'm trying to get the Apollonius geometry function to work with a set of circles, and it's giving me some trouble. I suspect I'm doing something wrong, but I don't know what. I'm using Maple 10.02 on Windows XP. When I do the following, everything works great: with(geometry): circle(test1,[point(t1p,0,0),1]): circle(test2,[point(t2p,2,0),1]): circle(test3,[point(t3p,0,3),1]): tapp := Apollonius(test1,test2,test3); tapp := [Ap1_of_test1_test2_test3, Ap2_of_test1_test2_test3, Ap3_of_test1_test2_test3, Ap4_of_test1_test2_test3] However, when I change the test3 circle to be tangent to test1, I get this error:

## Possibility to call java programs from Maple TA...

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Hello, currently I am trying to find out about the java(CN,a,b,c,d,...) function named in the Maple TA help. I just knocked together a small class which implements the named public function public String eval(String[ ] args); I tried to figure out the right place for my class. So I created a *.jar file containing it. I put it inside the "java" directory contained in the Maple TA install dir. But this does not work. :-( Right now I am wondering where to put this class and/or jar-file?! Has anybody used this function and is able to help me out? I would be really thankful for a hint because that function promises to be very useful...

## Surface fit with boundary conditions...

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Hello dear Maple users! I have the following problem that I am trying to solve with maple. I have a set of data points (i made these up for now, the real set has more points) x:=( 1,2,3,4,5,6,7,8 ) y:=( 1,2,3,4,5,6,7,8 ) z:=( 3,1,3,2,4,7,7,9 ) Now, I know how to surface fit this and get maple to formulate an equation for z=f(x,y) with the following statement: w:=(Statistics:-Fit(a + b*x + c*y + d*x^2 + e*x*y+f*y^2,
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