A is pretty large (and sparse). I'd really like to be able to calculate this, using less RAM.
I wouldn't call myself an expert on eigenvalue algorithms, but I had some ideas.
First, you've been using a MatLab http://www.mathworks.com/help/techdoc/ref/sparse.html" matrix for A, right?
Second, you could try setting a variable to A'*A, then clearing A, and then having a call to eig on that variable.
If you're on unix and you don't need the development environment, an option is to run a MatLab script with the "-nojvm" command line option.
Other than that, increase the swap size. If that's not enough, get the following if you aren't already using them for this task:
a 64 bit OS (and computer if needed)
Thanks for the suggestions
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