MATLAB: Deleting a certain variable in the base workspace via a function

base workspace variableevalinexport2wsdlg

hi, assume i have the variable x in the base workspace.

I want to delete that variable x via a function. How can I accomplish this?

thanks

Best Answer

Try

    evalin( 'base', 'clear(''x'')' )

and simpler

    evalin( 'base', 'clear x' )

But take the advice of Image Analyst seriously

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MATLAB: Clean variables of worskpace from GUIDE

You can send commands to base workspace using the evalin() function as you mentioned. For example you can say:

 evalin('base','who')

and to clear a variable myvarinbase say

 evalin('base','clear myvarinbase')

Note that

 clear var1 var2

will remove variables var1 var2 from the current workspace, not necessarily base workspace, if it is called from inside a function like a GUI.

MATLAB: Loading from Workspace via string

The matfile function has an interface similar to what you're looking for. You do need to be careful with indexing if you want to prevent loading of the entire variable, but it will allow you to mostly keep the contents of the mat files on the disk instead of memory.

Note that there is a trade-off: this is slower to work with than having the variables in memory, but it might save time and memory when retrieving the variable if you have large variables stored in the mat file and are not using those.

Best Answer

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MATLAB: Clean variables of worskpace from GUIDE

MATLAB: Loading from Workspace via string

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