[R] finding max value in a row and reporting colum name
luigi.bertolotti at gmail.com
Mon Aug 2 13:51:24 CEST 2010
> Hopefully someone can point me in the right direction on how I would go
> about solving the following.
> I have some data and need to find the column name of the maximum value in
> each row.
> This could be the data...
>> a <- data.frame(x = rnorm(4), y = rnorm(4), z = rnorm(4))
> x y z
> 1 1.6534561 0.11523404 0.2261730
> 2 -1.2274320 -0.24096054 1.5096028
> 3 -1.4503096 0.07227427 1.6740867
> 4 0.1867416 1.25318913 -0.7350560
> Here is what I need to generate...
> 1 x
> 2 z
> 3 z
> 4 y
> Any pointers would be appreciated.
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