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freq
2010 May 27
1
adding column to data frame conditionally
Dear all and thanks in advance for helping me with a rather stupid question:
I imported a data set ("freqg") into R consisting of 14 variables. Now
a want to compute a variable and add it in an additional column to my
data frame. The value of this new variable ("condition") depends on
the values of two other variables ("mat" and "flank") already included
in the...