[R] calculate an value in dependence of another column
matthias.weber at fnt.de
Fri Jan 17 10:12:31 CET 2014
i have a little problem, to create a new column, in a data.frame.
I know i can calculate one column with as a example 2 like this:
ORDER$WEIGHT <- ORDER$VALUE * 2
But how can i create the ORDER$WEIGHT with different numbers, like this one.
I have a data.frame like this one:
ORDER DESTINY VALUE
A NY 100
B BER 10
C FRA 100
D WAS 50
I want now the column ORDER$WEIGHT in dependence of "DESTINY". NY should be
*3, BER *2, FRA*1 and WAS * 4.
The solution look like this one:
ORDER DESTINY VALUE WEIGHT
A NY 100 300
B BER 10 20
C FRA 100 100
D WAS 50 200
Maybe anyone can help me, how i can do this?
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