[R] indices of rows containing one or more elements >0

From: Ng Stanley <stanleyngkl_at_gmail.com>
Date: Wed, 13 Feb 2008 10:40:09 +0800


Hi,

Given test <- matrix(c(0,2,0,1,3,5), 3,2)

> test[test>0]

[1] 2 1 3 5

These are values >0

> which(test>0)

[1] 2 4 5 6

These are array indices of those values >0

> which(apply(test>0, 1, all))
[1] 2

This gives the row whose elements are all >0

I can't seem to get indices of rows containing one or more elements >0

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