find max value in different columns

Hi,
Try:
dat <- read.table(text="ID??? ONE? TWO? THREE
1??? 2????? 5??????? 7
2??? 6????? NA????? NA
3??? 5????? 7??????? NA
4??? 1????? NA????? NA",sep="",header=TRUE)
dat1 <- dat

#Either:
dat$MAX <- apply(dat[,-1],1,max,na.rm=TRUE)


#or
?dat1$MAX <- do.call('pmax',c(dat1[,2:4],list(na.rm=TRUE)))
?identical(dat,dat1)
#[1] TRUE
A.K.

Hello together,

i have a data.frame like this one:

ID? ? ONE?  TWO?  THREE
1? ?  2? ? ?  5? ? ? ? 7
2? ?  6? ? ?  NA? ? ? NA
3? ?  5? ? ?  7? ? ? ? NA
4? ?  1? ? ?  NA? ? ? NA

Now i want a new column with the max-Value of "ONE", "TWO" and THREE. The
result look like this one:

ID? ? ONE?  TWO?  THREE? ? MAX
1? ?  2? ? ?  5? ? ? ? 7? ? ? ? ?  7
2? ?  6? ? ?  NA? ? ? NA? ? ? ?  6
3? ?  5? ? ?  7? ? ? ? NA? ? ? ?  7
4? ?  1? ? ?  NA? ? ? NA? ? ? ?  1

how can i do this?

thank you. Mat



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