Message-ID: <Pine.GSO.4.20.9912071645250.20368-100000@laplace>
Date: 1999-12-07T16:46:34Z
From: Jonathan Rougier
Subject: Finding indices with a certain property
In-Reply-To: <Pine.LNX.4.10.9912071753490.2138-100000@localhost.localdomain>
On Tue, 7 Dec 1999, [ISO-8859-1] Göran Broström wrote:
>
> I want the indices i for which x[i] < 0 (say):
>
> > x <- c(1, -1, 3, 3, -2)
> > where.negative(x)
> [1] 2 5
Try "which(x<0)".
Jonathan Rougier Science Laboratories
Department of Mathematical Sciences South Road
University of Durham Durham DH1 3LE
"[B]egin upon the precept ... that the things we see are to be
weighed in the scale with what we know" (Meredith, 1879, The Egoist)
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