[R] R grep question

[Kai Yang]

Hi List,
I wrote the code to create a new variable:
CRC$MMR.gene<-ifelse(grep("MLH1"|"MSH2",CRC$gene.all,value=T),"Yes","No")
 

I need to create MMR.gene column in CRC data frame, ifgene.all column contenes MLH1 or MSH2, then the MMR.gene=Yes, if not,MMR.gene=No

But, the code doesn't work for me. Can anyone tell how to fix the code?

Thank you,

Kai
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