How do I plot this function in MATLAB?

Hello Everyone,

I am having trouble with entering the equation Z = sin(sqrt(x.^2 + y.^2))/(sqrt(x.^2 + y.^2)) into MATLAB so I can plot it as a surface plot. The MATLAB program keeps on turning this equation into the value -0.0227, rather than accecpting it as an equation (which make no sense).

This issue is preventing me from making a surface plot, as I am told that Z is a scalar or vector (because the program computed it as that for some reason), rather than a matrix.

Can anyone tell me what I am doing wrong with either the syntax or another aspect of the entry?

I would greatly appreciate it.

Thank you

[Stephen23]

Information on the differences between array and matrix operations:

http://www.mathworks.com/help/matlab/matlab_prog/array-vs-matrix-operations.html

That list of operations that these difference apply to is important to keep in mind!

Answer 1

[Michael]

Nevermind, I solved this issue by adding a period (.) before the division (/) sign, so now things look like this:

Z = sin(sqrt(X.^2 + Y.^2))./(sqrt(X.^2 + Y.^2))

Answer 2

[Mischa Kim]

Michael, use something like

 [x,y] = meshgrid(0:0.1:5,0:0.1:5);
 Z = sin(sqrt(x.^2 + y.^2))./(sqrt(x.^2 + y.^2)) ;
 surf(x,y,Z)

[Michael]

Thanks Mischa,

I've done something similar to that and everything looks wonderful.

- Mike

Answer 3

[Shashyabh Ray]

how to plot y=(exp.^(sqrt(x)))./(x*x - x*(exp(x))).^(1/3);