Need help graphing a surface!

Hi,

I am graphing x, y, z equations into surfaces. I am currently doing this in Excel. However, in Excel, I have to use 'matrices' with defined values. How can I graph an equation like this...

x = y + z

...without needing to have defined values/matrices.

How can I do this? Should I stick to Excel? move to MatLab? or is there a better application out there to do this?

Thanks

Answer 1

[Mischa Kim]

MATLAB is your tool. Try

[x,y] = meshgrid(0:.1:10);
z = x - y;
mesh(z);
box

mesh is only one of several options you can use to plot data in 3D.

[Walter Roberson]

That requires that matrices be defined, which "A" wants to avoid.

Answer 2

[Walter Roberson]

Depending on your equation forms, you might be able to use MATLAB's explot()

Answer 3

[A]

I'll check it out. Here's another question:

How can I superimpose multiple equations onto one plot creating this 'mixed' surface?