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Need help graphing a surface!

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A
A on 5 Feb 2014
Closed: MATLAB Answer Bot on 20 Aug 2021
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

Answers (3)

Mischa Kim
Mischa Kim on 5 Feb 2014
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.
  1 Comment
Walter Roberson
Walter Roberson on 5 Feb 2014
That requires that matrices be defined, which "A" wants to avoid.

Walter Roberson
Walter Roberson on 5 Feb 2014
Depending on your equation forms, you might be able to use MATLAB's explot()

A
A on 5 Feb 2014
I'll check it out. Here's another question:
How can I superimpose multiple equations onto one plot creating this 'mixed' surface?

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