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

Question

Aijalon Marsh 2022-3-8

0
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https://ww2.mathworks.cn/matlabcentral/answers/1666154-i-made-a-function-and-m-file-to-call-that-function-but-for-some-reason-its-giving-me-an-error-of-un

编辑： Cris LaPierre 2022-3-10

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)

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Answer 1

Cris LaPierre 2022-3-8

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https://ww2.mathworks.cn/matlabcentral/answers/1666154-i-made-a-function-and-m-file-to-call-that-function-but-for-some-reason-its-giving-me-an-error-of-un#answer_912629

编辑：Cris LaPierre 2022-3-10

在 MATLAB Online 中打开

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