>>97499572PCA plot works like this
>give each variable its own dimension>have a couple hundred variables, one for each gene>can't visualize a 1000 dimensional space>so tell the program to find the 2D slice which maximizes the groupingsThat's how it works. That is the aggregate of like 1000 genes and there emerges very clear groupings. PCA plot is perfectly scientific, it's used for all sorts of things
