I made a function and m-file to call that function but for some reason its giving me an error of "Undefined function or variable y" please help to fix my code

Function:

function MagnitudeRatio2ndOrder(E, W, w)
y= 1/(sqrt((1-(w/W)^2)^2+((2*E*w)/W)^2));
end

New m-file:
clear
E = 0.3; 
W = 1; 
w = 0;
hold on
MagnitudeRatio2ndOrder(E, W, w);
results = y;
disp(results)

Answer 1

[Cris LaPierre]

First, you need to define your function declaration to have an output variable. It looks like you want it to return y.

function [y1,...,yN] = myfun(x1,...,xM)

You need to assign the output of your function to a variable if you wish to use it. It looks like you want to name the variable results. You could do this

E = 0.3; 
W = 1; 
w = 0;
results = MagnitudeRatio2ndOrder(E, W, w)

results = 1

function y = MagnitudeRatio2ndOrder(E, W, w)
y= 1/(sqrt((1-(w/W)^2)^2+((2*E*w)/W)^2));
end