[R] calculate an value in dependence of another column
Gerrit.Eichner at math.uni-giessen.de
Fri Jan 17 10:36:59 CET 2014
e. g., try something like
ORDER$VALUE * c( NY = 3, BER = 2, FRA = 1, WAS = 4)[ ORDER$DESTINY]
Hth -- Gerrit
On Fri, 17 Jan 2014, Mat wrote:
> Hello together,
> 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?
> Thank you.
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