C = load( ‘A.mat’, ‘B’);
B = C.B;
Note that you do not actually need to assign the variable B. Instead you can simply access the structure field whenever you need to:
mean(C.B)
Although some people might tell you to do this:
load( ‘A.mat’, ‘B’);
in fact this is a very bad way to load data. It means that variables magically "poof" into existence in the workspace. Much better is to load into a structure.
