[R] dividing vectors into bins with equal widths

[Dimitris Rizopoulos]

you probably looking for something like:

x <- rnorm(20)
out <- cut(x, quantile(x, seq(0, 1, len = 11)), include.lowest = TRUE)

out
table(out)


I hope it helps.

Best,
Dimitris

----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
     http://www.student.kuleuven.be/~m0390867/dimitris.htm


----- Original Message ----- 
From: "W. Daniel Kissling" <kissling at uni-mainz.de>
To: <r-help at stat.math.ethz.ch>
Cc: <kissling at uni-mainz.de>
Sent: Tuesday, November 14, 2006 1:52 PM
Subject: [R] dividing vectors into bins with equal widths


Hi R-users,

I am trying to divide a vector (say X) into equal frequency bins. If 
one uses the hist()
function, then a histogram is plotted, but with bins of equal widths, 
and not with bins
having the same number of data points.

I have then tried the histogram() function as follows:

histogram(X, nint=10, breaks=NULL, equal.widths=F)

This works as I want. However, I can't extract which points are in 
which bin, or where
the breakpoints are made.

Can anybody help?

Thanks
Daniel

--------------------------------------------------------------------
W. Daniel Kissling
Institut für Zoologie, Abteilung Ökologie
Johannes Gutenberg-Universität Mainz
D-55099 Mainz, Germany
E-mail: kissling at uni-mainz.de

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