How to add a variable that is not shown in workplace to the workplace?

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reza
reza 2019-1-24
编辑： Stephen23 2019-1-24
Sometimes I write some functions but I cant see some of my variables in workplace after I run the code! Why this happens and how can I see them in workplace too?
for example this code doesn't show the "z" or "a" or "temp" or "p" in the workplace:
z = X * all_theta';
a = sigmoid(z);
[temp p] = max(a, [], 2);

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回答（1 个）

Stephen23
Stephen23 2019-1-24
编辑：Stephen23 2019-1-24
"Sometimes I write some functions but I cant see some of my variables in workplace after I run the code!"
That is the expected behavior: every function has its own independent workspace:
https://www.mathworks.com/help/matlab/matlab_prog/base-and-function-workspaces.html
"Why this happens and how can I see them in workplace too?"
By far the simplest way to get variables from a function workspace into the base workspace is to pass them as output arguments, exactly as the MATLAB documentation recommends:
https://www.mathworks.com/help/matlab/matlab_prog/share-data-between-workspaces.html
For example:
function y = myfun(x);
y = sqrt(x)+2;
end
And tested:
>> out = myfun(16)
out = 6

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