Displaying 1 result from an estimated 1 matches for "tp21337371p21360273".
2009 Jan 07
4
Another newbie question
Problem:
I have a data frame with 1s and 0s denoting presence/absence of species
(columns) for particular plot measurements (rows). What I want to do is make
a new column whose entries for each row is a list of the column names in
which a species is present (ie. for row one its entry might read:
"sp1","sp2", etc.). I've tried various functions etc. but can't seem to