I have been reading various articles/papers on PCA and some of the authors mention it as a Eigen values whereas others go by singular values. From whetever remnants of Bachelor's algebra in my memory, I believe that EVD is not the same as SVD (although they are closely related).

My question is - While doing PCA, what should I use - EVD or SVD? I was trying it on Matlab and they have implementation of both, but the PCA function in Matlab seems to be using Eigen values. It would be nice if someone can clear this.

Thanks.