MATLAB clears variables in memory

Introduction

During data processing, sometimes some variables occupy a large amount of memory space. After using them, you need to consider releasing the memory. Here are several ways to release variable memory.

clearvars syntax

clearvars
clearvars variables
clearvars -except keepVariables
clearvars variables -except keepVariables
clearvars -global ___

Here you can delete multiple variables at once, except for a certain variable, and use regular expressions to delete variables.
Specific usage: https://ww2.mathworks.cn/help/matlab/ref/clearvars.html

clear syntax

clear
clear name1 ... nameN
clear -regexp expr1 ... exprN
clear ItemType

Specific usage: https://ww2.mathworks.cn/help/matlab/ref/clear.html