Hi,
Here's the data we have:

> rs[1:5,]
        probe_id f1 f2 f3 f4          M        A  f
1 A_68_P20002076  2 58  0  0 1.51778114 6.344453 59
2 A_68_P20002775 22  8 15  0 0.43419304 5.488819 59
3 A_68_P20005791 43  3  0  0 0.05698666 9.830594 59
4 A_68_P20005805 11 34  0  0 1.71076835 6.624038 59
5 A_68_P20006729 16 44  0  0 0.85498261 6.044229 59

I want rs$f be the max of f1, f2, f3, f4 like a function in excel (=max(f1,
f2, f3, f4)).

How should we do it in R? I'm not familiar with programing with list. So
please be patient
 Thanks
-- 
Regards,
Anh Tran

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