[R] Find max of a row in data frame (like Excel)

[Erik Iverson]

?pmax

Anh Tran wrote:
> 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