[R] putting stuff into bins...
mothsailor at googlemail.com
Tue Sep 26 14:13:47 CEST 2006
This would work. The point is to make a factor from the breakpoints
using cut, then use this to calculate the statistics on the binned
> x <- rnorm(500)
> f <- cut(x,10)
1 (-2.71,-2.09] -2.3668991
2 (-2.09,-1.46] -1.7332011
3 (-1.46,-0.834] -1.1156487
4 (-0.834,-0.208] -0.5117649
5 (-0.208,0.418] 0.1277991
6 (0.418,1.04] 0.7092500
7 (1.04,1.67] 1.2859184
8 (1.67,2.3] 1.9347327
9 (2.3,2.92] 2.5518835
10 (2.92,3.55] 3.2873698
On 26/09/06, Federico Calboli <f.calboli at imperial.ac.uk> wrote:
> Hi All,
> I have a vector of data, a vector of bin breakpoints and I want to put my data
> in the bins and then extract fanciful informations like the mean value of each bin.
> I know I can write my own function, but I would have thought that R should have
> somewhere a function that took as arguments something like (data, breaks, what
> to do with the data in the bins). I surey could not find it trawling the R-help
> archives though.
> If such a function exists I'd be grateful to anyone pointing it out to me.
> 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 7594 1602 Fax (+44) 020 7594 3193
> f.calboli [.a.t] imperial.ac.uk
> f.calboli [.a.t] gmail.com
> R-help at stat.math.ethz.ch mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
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