clear all variables but one in matlab

To clear all variables except one in MATLAB, use the clearvars function followed by the name of the variable that you want to keep.

Here is an example of how to do it:

main.m
% define some variables
a = 1;
b = 2;
c = 3;

% clear all variables except 'b'
clearvars -except b
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After running this code, the variables a and c will be cleared from the workspace, while b will remain.