Sorry guys, but I have another one:
I want to write a function that returns a certain column of a
dataframe. The function accepts two argument: the dataframe and the
name of the column, but the column is not given as a "string" but as
a variable name.
EXAMPLE
----------------------
> testdata
start stop censor groupvar var1 var2
1 0 1 0 1 0.91663902 0.0847912
2 1 2 0 1 0.60470753 0.6487798
3 2 3 0 1 0.09599891 0.2195178
x
k <- function(df, col) df[col]
EXPECTED RESULTS
-------------------------------------
k(testdata, var1) should return the same output as testdata["var1"],
which is
var1
1 0.91663902
2 0.60470753
3 0.09599891
4 NA
5 0.07747445
6 0.44608030
7 0.77317152
Note that I want to use k(testdata, var1) instead of k(testdata,
"var1").
Thanks for your help!
All the best
Philipp
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