How can i keep my variables after running the function?

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Niloufar Hojat 2019-7-15

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编辑： Adam Danz 2019-12-2

I have written a function that does some data anlayising on a table and then I have another function that uses that analysed data and does further analyses on it. The two functions used to be one but I have separated them. Is it possible to keep the variables once a function has run as currently all the variables in the function are cleared after running it.

Many thanks,

Nima

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KALYAN ACHARJYA 2019-7-15

Variabes from function file or main script?

Stephen23 2019-7-15

By far the simplest, neatest, and most efficient way to pass variables from one workspace to another is to pass them as input/output variables. Have you tried doing that?

https://www.mathworks.com/help/matlab/matlab_prog/share-data-between-workspaces.html

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Answer 1

Adam Danz 2019-7-15

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编辑：Adam Danz 2019-12-2

" Is it possible to keep the variables once a function has run "

Yes.

Add outputs to your function if variables are immediately needed in other functions or scripts.

Otherwise, you can save any (or all) variables within a function by calling save(filename,variables) at the end of the function (for troubleshooting purposes).

If you are running a script, any variables within the script are already available in the caller workspace.

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Guillaume 2019-7-17

编辑：Guillaume 2019-7-17

"I hesitate to suggest save, as it encourages saving the entire workspace and then poofing them back with load."

In addition round-tripping through a file is never going to be fast. It's certainly not the way to go.

If the two functions must share the same entire workspace then there's a fundamental design issue. If it's only a few variables, then inputs and outputs are definitiively the way to go. If it's the whole workspace then i'd question if the code should have been split.

Adam Danz 2019-7-17

编辑：Adam Danz 2019-7-17

I added a caveat to the save() suggestion. Sometimes this approach is useful when troubleshooting a function that takes a long time to run and breaks only seldomly. As far as passing variables between functions, the save/load approach is clearly a bad idea.

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