Hi,
I 'd like to know how to retrieve a column name of a data frame. For
instance :
df = data.frame(c1=c('a','b'),c2=c(1,2))
> df
c1 c2
1 a 1
2 b 2
I would like to retrieve the column name which value is 2 (here, the column
is c2)
thanks for your help
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