Hello,

I am a relatively new R-user who has a lot to learn. I have a large dataset 
that is in the following dataframe format:

red             A       B       C
green   D
blue    E       F

Where red, green and blue are "species" names and A, B and C are observations 
(corresponding to DNA sequences). Each observation can only belong to one 
species. I would like to list the observations in one column, with the species 
they belong to in the next. Like this:

A       red
B       red
C       red
D       green
E       blue
F       blue

I have tried using reshape() and stack() but I cannot get my head around it. 
Any help is highly appreciated!

Thanks in advance,
__________________________________

Mia Bengtsson, PhD-student
Department of Biology
University of Bergen
+47 55584715
+47 97413634
mia.bengts...@bio.uib.no

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