I want to use a term after it has been isolated.

For example, say that I have equation1 (eq1) and I want to use the y term in the next equation, s. 

eq1:=x+y=2;

isolate(eq1,y);

s=z+y;

This returns s=z+y not s=z+x-2. I would like s=z+x-2. How do I do that?

I am trying to do animated plots of vector fields and I'm running into a problem with the fieldstrength parameter.

Basically the way a typical vector field plot works is that every time it plots a vector it scales it by some amount based on field strengths of the other vectors on the plot.  So for example, if you use the "fixed" option it scales arrows by 0.9 times the maximum arrow size for the grid.

I have a nonlinear algebraic system with x ,y unknowns and beta parameter (0<beta<1); I want to plot in 3d the triplets (x,y,beta), where x and y are the solution of system for ten different values of beta.

For now I am able only to solve the system with fsolve, but I don't want to copy the solutions with copy and paste, because in the future I have to give to beta much more values than 10. Can anyone help me, please? This is the program:

F:= <<-3u|u|u|u>, <u|-3u|u|u>, <u|u|-3u|u>,<u|u|u|-3u>>;

There is a very nice sheet by Sergej Moiseev Orthogonal Functions, Orthogonal Polynomials, and Orthogonal Wavelets series expansions of function at the Application Center, www.maplesoft.com/applications/app_center_view.aspx.

I am trying to create a simple loglogplot, but i am getting an empty plot error. Here is my code:

with(plots);

c:=2.998*10^8;

I'd like to know how to insert the following differential equation in maple 12 (or older doesn't matter that much) without incuring a - Error, recursive assignment -

Plaese note that, in the orignial text, a dott is added over the variable x1:

 x1(dot) := -2*a*x1*(x1-1)+(1-b)*x0

and that this differential equation describes change in the number of entities (x) that move through state 1, there a couple of more equations but i can't figure out how to insert the above one in maple correctly.

please help me here. I want to simplify the expression:

(-f(xn)^2*f(zn)+f(xn)^2*(D(f))(zn)*zn+f(xn)*f(zn)^2-2*f(xn)*f(zn)*(D(f))(zn)*zn+(D(f))(zn)*xn*f(zn)^2)/((D(f))(zn)*(f(zn)^2+f(xn)^2-2*f(xn)*f(zn)))

I just compied it directly from maple

Hi, I'm running into difficulty regarding plotting an array I have.  I have an array of 500 elements and each element corresponds to an even integer.  Hence I want to plot for x=1..1000 where array[1] is plotted at x=2, array[2] is plotted at x=4 etc, and the odd numbers are left empty.  How do I do this.  I tried

fn := proc(n)
  global array:
  if n mod 2 = 0 then return array[n/2]:
  end if:
end proc:

I got a big problem with one kind of integral function. Now, I am using Maple 8 or Maple 11 to get some results from my research topic. However, when I took three times integral like :

f:= Int(exp(-t^2),t = 0 .. infinity)+Int(Int(2*Int(.1*exp(-.25*(u-s-k)^2)*exp(-(-.5*u-.5*s-.5*k+t)^2)*exp(.25*(u-s-k)^2)*exp(-.1*k),k = 0 .. u-s)*exp(-u^2)*u,u = s .. t),t = 0 .. infinity);

After that, I try to draw the grahp of the above equation.

plot(f,s=0..1);

i'm using Maple Toolbox For Matlab. How to do this : sin(x)*cos(y)+sin(y)*cos(x) = sin(x+y) ?.

i used " simple" command but not done.

Hello, I hope I am not too late to enter for this contest. I made this worksheet a bit ago to show how you can rotate 3D plots. I think it's pretty cool to be able to do this. I attached the file below. -Geoff

Hi

I am trying to learn the logically equivalent command in Maple.

[(p->q)^(q->r)]->(p->r)

I wish I could post my maple file.

Any suggestions are going to be highly appreciated.

Thanks
 

I have found the distance between two points and considered the endpoints of the diameter of a circle I found the center points.  Now I need to graph.  How?