How to use fplot to plot a function file with single input mutiple outputs?

Hello, I have a function file that contains 5 outputs and one input. I would like to plot the outputs on a single plot against a range of input values. fplot works nicely when I have a single output but does not work for multiple outputs (it doesn't plot all 5 outputs). Please help me. Thank you

Answer 1

[Guillaume]

You'll have to explain what 'does not work for multiple outputs' mean exactly:

fn = @(x) [sin(x), cos(x), sin(x.^2), cos(x.^2), sin(x) + cos(x)]; %function with 5 outputs
fplot(fn, [-pi, pi])

works perfectly well. Do you get an error? If so, what is the error?

[sara]

I mean it only plots one of the outputs. So I have a function file with 3 outputs: function [ x, y, z] = myfunction( A )

and I would like to plot x, y, z with respect to A using fplot. When I do the following, only one of the outputs get plotted. hold on fplot('myfunction',[0.2 0.5])

[Guillaume]

The outputs need to be concatenated into a row vector for fplot to work.

You can either rewrite your function as:

function [x(:, 1), x(:, 2), x(:, 3)] = myfunction(A)
  %...
end

Or use an intermediary function:

function x = catmyfunction(A)
  [x(:, 1), x(:, 2), x(:, 3)] = myfunction(A);
end

then

fplot(@catmyfunction, [0.2, 0.5]);