## GPL10558 Illumina HumanHT-12 V4.0 expression beadchip
library(Biobase)
library(GEOquery)
#Download GPL file, put it in the current directory, and load it:
gpl <- getGEO(‘GPL8841′, destdir=”.”)
colnames(Table(gpl))
head(Table(gpl)[,c(1,4)]) ## you need to check this , which column do you need
ID2symbol=Table(gpl)[,c(1，4)]
得到了包含ID和symbol的文件，然后如何将GEO（GSE34472）芯片矩阵中的ID换成symbol呢？