Create folder when non existing

getMat.m

-function m = get_mat(folder,name,isWritable)
+function m = getMat(folder,name,isWritable)
 %GET_MAT Summary of this function goes here
 %   Detailed explanation goes here
 
+if isWritable && ~exist(folder,'dir')
+    mkdir(folder);
+end
+
 namemat = fullfile(folder,[name,'.mat']);
 m = matfile(namemat,'Writable',isWritable);
 end
\ No newline at end of file