R: Using colnames in data$ operation

Asked Jan 13 '17 at 14:32

Active Jan 13 '17 at 14:36

Viewed 33 times

I have a problem with using output of names() in data$ operation. The set-up of the code is:

list <- names(train1aM1)
list
#[1] "MOSTYPE"  "MAANTHUI" "MGEMOMV"  "MGEMLEEF" "MOSHOOFD" "MGODRK"   "MGODPR"   "MGODOV"  
#[9] "MGODGE"   "MRELGE" ......

list[1]
#[1] "MOSTYPE"

as.name(list[1])
#[1] MOSTYPE

This returns value:

train1aM1$MOSTYPE
#[1] 33 23 33 11 33 23 38 13 33 13 34 13 37 40 31 24  8  7 41 39 33 24  8 33  3 38 39 33 33 ....

But the following code returns NULL.

test <- as.name(list[1])
train1aM1$test
#NULL

What is wrong?

edited Jan 13 '17 at 14:36

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asked Jan 13 '17 at 14:32

Keet

1

This is a manytimes duplicate but I'm too lazy to search. Reading `help("[")` will be useful to you. – Roland Jan 13 '17 at 14:36
Thank you!! Problem solved. – Keet Jan 13 '17 at 14:43

R: Using colnames in data$ operation

0 Answers0