help
Cc:
Sent: Wednesday, April 17, 2013 1:33 AM
Subject: [R] Transformation of a variable in a dataframe
HI,
I have a dataframe with two variable A, B. I transform the two variable
and name them as C, D and save it in a dataframe dfcd. However, I wonder
why can't I call them by dfcd$C an
On Apr 16, 2013, at 10:33 PM, jpm miao wrote:
HI,
I have a dataframe with two variable A, B. I transform the two
variable
and name them as C, D and save it in a dataframe dfcd. However, I
wonder
why can't I call them by dfcd$C and dfcd$D?
Because you didn't assign them to dfab$C. It's
Hi,
Because a column name exists for "C" and "D":
> colnames(C)
[1] "A"
> colnames(D)
[1] "B"
One possibility:
> A=c(1,2,3)
> B=c(4,6,7)
> dfab<-data.frame(A,B)
> C=dfab$A*2
> D=dfab$B*3
> dfcd<-data.frame(C,D)
> dfcd
C D
1 2 12
2 4 18
3 6 21
> dfcd$C
[1] 2 4 6
HTH,
Pascal
On 04/17/2013 0
HI,
I have a dataframe with two variable A, B. I transform the two variable
and name them as C, D and save it in a dataframe dfcd. However, I wonder
why can't I call them by dfcd$C and dfcd$D?
Thanks,
Miao
> A=c(1,2,3)
> B=c(4,6,7)
> dfab<-data.frame(A,B)
> C=dfab["A"]*2
> D=dfab["B"]*3
>
4 matches
Mail list logo
