[R] Select the column from the data.frame?

[arun]

Hi,
Try:
set.seed(24)
dat1<- as.data.frame(matrix(sample(1:60,15*5,replace=TRUE),ncol=15))
colnames(dat1)<- paste0("a",c(3,1,5,7,2,8,11,14:15,10,9,6,12:13,4))
 subDat1<-dat1[colnames(dat1)[as.numeric(gsub("[A-Za-z]","",colnames(dat1)))<=10]]
 subDat1
#  a3 a1 a5 a7 a2 a8 a10 a9 a6 a4
#1 18 56 37 55  6 42   5 28 60  9
#2 14 17 23 12 34  5  24 52 28 13
#3 43 46 41  3 44 36  22 28 18  1
#4 32 49 41 31  9 38  16 43 11 60
#5 40 16 20  9 14  3  21 33  9 39
A.K.


>Hi, 
>    I have one data set with 15 variable like a3, a1, a5, a7,a2, a8,
 a11, a14, a15, a10, a9, a6, a12, a13, a4. From this variable i want to 
select >variables from a1:a10. Please helpe to to get the result..