Create vector/matrix inside function

조회 수: 10(최근 30일)
Tejay Lovelock
Tejay Lovelock 2016년 5월 9일
댓글: Stefan Raab 2016년 5월 9일
Hi All,
I have a simple function file.
If I put something like this inside the function file; A = [1 2 3 4];
It will display this in the command window;
A = 1 2 3 4
But it won't save A in the Workspace as a vector.
How can I create a vector inside a function file and have that vector saved to my Workspace?
Thanks!

채택된 답변

Stephen23
Stephen23 2016년 5월 9일
편집: Stephen23 2016년 5월 9일
You return it as an output argument.
Like the MATLAB documentation clearly states, the best practice is to pass arguments:
So your function could be something like:
function [ct,A] = critPT( ... )
...
A = ...
ct = ...
...
end
and then call it:
[NewCT,newA] = critPT(...)
Note: the fact that you do not "see" the variable A in the base workspace is the whole point of functions: they should have independent workspaces, so that what happens inside any one function does not affect any other workspace. That is the point.
  댓글 수: 1
Tejay Lovelock
Tejay Lovelock 2016년 5월 9일
Thanks for that!

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추가 답변(1개)

Stefan Raab
Stefan Raab 2016년 5월 9일
Hello,
this is because functions have their own workspace. There is a good explanation in the MATLAB doc, please execute the following commands in the MATLAB Command Window to open the help browser:
  • Information on workspaces in general:
web(fullfile(docroot, 'matlab/matlab_prog/base-and-function-workspaces.html'))
  • Information on how to share data between workspaces:
web(fullfile(docroot, 'matlab/matlab_prog/share-data-between-workspaces.html'))
I hope this will help you.
Kind regards, Stefan
  댓글 수: 2
Stefan Raab
Stefan Raab 2016년 5월 9일
Ah, I was too slow :)

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