i have a data frame and a numeric vector indexed as a subset of the rows in
the data.frame. what command can i use to assign the values in the vector
to the appropriate rows of the data.frame? here's my failed attempt. what
i would want is data[1,'z'] == 2, data[5,'z'] == -4, data[8,'z'] == -5,
data[9,'z'] == 5, and for the other values of 'z' to remain 0.
> data
x y z
1 -6 4 0
2 -3 19 0
3 15 40 0
4 0 17 0
5 1 12 0
6 17 45 0
7 4 19 0
8 -13 -16 0
9 -7 5 0
10 -5 22 0
> vec
1 5 8 9
2 -4 -5 5
> data['z']=vec
Error in `[<-.data.frame`(`*tmp*`, "z", value = c(2, -4, -5, 5)) :
replacement has 4 rows, data has 10
>
thanks,
Rnewb
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