A bit of a silly question (I suspect). I am using MATLAB to preprocess some bulk RNAseq data. I am calling PCA on my normalized counts just as an initial way to identify outliers I didn’t automatically reject. There are indeed some clear outliers but I am not sure how to use the score matrix output by pca to filter my original data because it is now in descending order of explained variance. How can I use the pca scores to return to the indicies of problematic samples. Thank you so much! Info below: