@Kirsty Alsop: the most important question is how did you get those 180 matrices into the workspace? Presumably you did not sit and write them all out by hand, in which case they must have been imported somehow, or generated in a loop somehow... and that is the correct location to fix this problem! If you tell us how these variables first got into your workspace, then we can show you better ways to design your code, so that your data handling is simpler, more efficient, and less buggy.
Magically accessing variable names is one way that beginners force themselves into writing slow, complex, buggy code that is hard to debug. Read this to know why:
