Monitoring Variables Defined Within Functions to Debug

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I have a program I'm running that uses a function I've written. In some cases where the function is called, it throws an error, and in other cases, it does not. Matlab tells me that there's an issue with one of the variables defined inside the function, however I do not see the variable in the workspace. How do I look at the values held in variables local to my functions?

Accepted Answer

Torsten
Torsten on 7 Nov 2025
Edited: Torsten on 7 Nov 2025
After the variable is computed, you can list the variable's name by itself on it's own line in your function code, with no semicolon after it. When execution hits that line of code, it will spew the value of the variable out to the command window.
Example: The following code displays the values of b taken in function "test".
test(4)
b = 5
b = 7
b = 9
b = 11
function [] = test(jmax)
for j = 1:jmax
a = 2*j;
b = 3 + a;
b
end
end

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