GSEA with phenotype permutation

[NhatLe-github]

Dear Yu,

I'm Dr. Nhat Le, a biostatistician/bioinformatics from OUCRU Vietnam.

Could you please incorporate phenotype permutation into your GSEA function? I think since the input gene list can be ordered in any kind of measure. For generality, you could allow the user to input a matrix of permutated data. Each column for one permutation. It means that users do the permuation by themself.

This would make the GSEA function complete. I would love to hear your opinion.

Thanks and cheers,
Nhat