principle componenet analysis of microarray data in r

Question

[au.rinki.bio]

hello biostars, I want to do principle componenet analysis of gene expression microarray data,data contain 4 sample for normal condition and 5 sample for disease state. samples are present in coloumn and gene id presented in rows. i have already normalized data using rma algorithm.Give me probable solution how to do this using r. thaking you.

[WouterDeCoster]

Googling things like "pca gene expression tutorial r" will give you plenty of ideas.

Answer 1

[Kevin Blighe]

It's easy:

• A: PCA plot from read count matrix from RNA-Seq
• A: PCA in a RNA seq analysis