[R] indexing a vector starting from 0

From: Federico Calboli <f.calboli_at_imperial.ac.uk>
Date: Mon 25 Jul 2005 - 06:29:34 EST


Hi All,

I would like to ask if it possible to start indexing a vector from 0:

x = 1:10

y = c(0,0,3,4,5,6,0,8,9,10)

I need to use y as an index to extract the values of x, BUT I cannot cull/transform the 0s. What I would like is to start counting the elements of x 0:9 rather than 1:10. Would this be at all possible?

Regards,

Federico Calboli

--
Federico C. F. Calboli
Department of Epidemiology and Public Health
Imperial College, St. Mary's Campus
Norfolk Place, London W2 1PG

Tel +44 (0)20 75941602   Fax +44 (0)20 75943193

f.calboli [.a.t] imperial.ac.uk
f.calboli [.a.t] gmail.com

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Received on Mon Jul 25 06:40:10 2005

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