Using load() returns a structure where all the variables inside the mat file are fields of this structure. You can extract them into their own variable if you want.
% Create mat file with two variables in the single mat file.
save(filename, 'myVar', 'otherVar');
% Show workspace panel:
workspace
% Get rid of them so we can test the recall
clear('myVar', 'otherVar');
% Recall it.
storedStructure = load(filename)
myVar = storedStructure.myVar;
otherVar = storedStructure.otherVar;
Understand now?
