[x] GTEx classification by tissue type (one vs rest)
[x] Compare to NMF and PCA on average precision and / or F1
[x] Sweep params and look at the performance
[ ] Difference from least squares solution of multiPLIER. We would have to think about this. (low priority)
[x] UMAP plot of the samples clustered together
[x] Take a one-vs-rest classifier (brain or heart), look at the top LVs, and examine the pathways, are they interpretable?
[x] Try using cell-type specific pathway databases, as in those derived from GTEx (see enrichr pathways here) -- this is a sanity check for interpretability
Run experiments on GTEx