Using FPLOT to plot a multi variable function

Lets say I have function f= (x^3+y^3+z^3). For a constant y and z, I want to plot function 'f' between xmin<x<xmax using fplot. Is this possible?

Answer 1

[Walter Roberson]

f = @(x,y,z) x^3+y^3+z^3;
ycon = 5;
zcon = .34;
fun = @(x) f(x,ycon,zcon);
xmin = -4;
xmax = 6;
fplot(fun, [xmin, xmax])

[Shima Khatiri]

What if y and z are not constant? how can we plot the general form?

[Walter Roberson]

If x, y, and z are not constant, then you have three input variables and one output variable, and you would need a four-dimensional plot. There are no facilities in MATLAB to do four-dimensional plots.

[Manuel Ruivo de Oliveira]

Your code gives me a plot, but also a warning:

"Warning: Function behaves unexpectedly on array inputs. To improve performance, properly vectorize your function to return an output with the same size and shape as the input arguments."

Is there an appropriate way to vectorize this?

[Walter Roberson]

f = @(x,y,z) x.^3+y.^3+z.^3;

[Manuel Ruivo de Oliveira]

Thanks, that works. I have a related question about plotting a function given as an integral depending on a parameter, but that seems to deserve it's own post so I'll start a new discussion.

Answer 2

[Naveen]

Never mind. I found it

fplot(@(x) f(x,yvalue,zvalue), [xmin xmax])

Answer 3

[Pratiksha Shinde]

How to find FFT of boost converter Boost converter

[Walter Roberson]

You should ask that in a new Question.