Print one column of data frame with row names

Question

Consider a data frame with custom row names:

> data <- data.frame(a=1:3,b=2:4,c=3:5,row.names=c(\"x\",\"y\",\"z\"))
> data
  a b c
x 1 2 3
y 2 3 4
z 3 4         


        

Answer 1

You can use the drop argument (see also ?'['):

data[,"c", drop=FALSE]

gives you a data.frame

  c
x 3
y 4
z 5

Answer 2

An even easier way is data['c'], which will result in the same output:

  c
x 3
y 4
z 5