Re: [R] extract elements

From: Prof Brian Ripley <ripley_at_stats.ox.ac.uk>
Date: Wed, 20 Jun 2007 12:03:04 +0100 (BST)

On Wed, 20 Jun 2007, Manuele Pesenti wrote:

> Dear R users,
> just another little question... are there other ways, I mean more easy to
> write, to obtain the same result I got with:
>
> data[95:length(dati[,1]), ]
>
> where data is a data frame
>
> to extract the last elements starting from a fixed position?

data[95:nrow(data), ]

assuming 'data' and 'dati' are intended to be the same thing.

(Easier to read, too, and correct even if data[,1] is a matrix.)

-- 
Brian D. Ripley,                  ripley_at_stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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Received on Wed 20 Jun 2007 - 11:25:05 GMT

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