Matlab judges whether the folder exists, and if it does not exist, create it

Create a new test applet, the code is as follows:

folder='test/12a/'; %%定义变量
if exist(folder)==0 %%判断文件夹是否存在
    mkdir(folder);  %%不存在时候，创建文件夹
else
    disp('dir is exist'); %%如果文件夹存在，输出:dir is exist
end

Status when not executed:

Perform the first time, there is no folder. Created at this time.

If there is a folder, execute "dir is exist".

Note: In general testing, you need to change the file directory according to your own needs.