[R] indexing a vector starting from 0

[Federico Calboli]

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