[R] add columns to a data.frame

Christoph Lange clange at epost.de
Fri Apr 12 18:50:02 CEST 2002

(Reply to juan pablo perez)

> Dear R community:
> it is possible to add a column wich results from an algebraic combination of 
> columns from a data frame to the same data frame?
> e.g
> I have a data frame like
> $X: num[1:10] 10,20,25,20...
> $Y: num[1:10] 152,458,698,587,...
> and I want to add a new column like
> $Z where Z=X+5*Y
> what should I do?



Christoph Lange                                    clange at epost.de
Verhaltensbiologie, FU Berlin                            838-55068
Haderslebener Str. 9, 12163 Berlin
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