Hello. I downloaded GSE57821 RAW data by getGEOSuppFiles command in R and now I have "filelist.txt" and GSE57821_RAW.tar files.
My command: gse <- getGEO("GSE57821", GSEMatrix = TRUE)
raw <- getGEOSuppFiles("GSE57821")
I want to normalize RAW data. Which way should I follow? How can I retrieve expression data from raw data?
exprs command is not working both in gse and raw files.
I am relatively new at gene expression analysis in R.