Opening Preexisting Functions

I'm trying to create a generalized SVD function in IDL which models the gsvd function in MATLAB, and it would be helpful for me to see how the gsvd function is computed. How would I go about opening prewritten code like the gsvd function in MATLAB?

Many thanks!

Answer 1

[Fangjun Jiang]

edit gsvd.m

Not all functions are provided with source code though.