[R] producing histogram-like plot

[Greg Snow]

Look at the cut, tapply, and barplot functions.  There is probably also a nice way to do this using ggplot2 package.

-- 
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Karin Lagesen
> Sent: Tuesday, March 29, 2011 3:05 AM
> To: r-help at r-project.org
> Subject: [R] producing histogram-like plot
> 
> Hi!
> 
> I have a dataset that looks like this:
> 
> 0.0	14
> 0.0	3
> 0.9	12
> 0.73	15
> 0.78	2
> 1.0	15
> 0.3	2
> 0.32	8
> 
> ...and so on.
> 
> I.e. a value between 0 and 1, and a number
> 
> I would like to plot this in a histogram-like manner. I would like to
> have a set of bins, each 0.1 wide, and plot the sum of values in column
> 2 that falls within each bin. I.e, in this case I would like the first
> bin, 0.0, to have the value 17, the second, 0.1, to have the value 0
> and
> so on, until the last bin which has the value 15. I am sadly uncertain
> of both how to sum these together, and also on which plot type to use.
> 
> Thanks in advance!
> 
> Karin
> --
> Karin Lagesen, Ph.D.
> Centre for Ecological and Evolutionary Synthesis (CEES)
> University of Oslo, Dept. of Biology
> P.O. Box 1066 Blindern 0316 Oslo, Norway
> Ph. +47 22844132 Fax. +47 22854001
> Email karin.lagesen at bio.uio.no
> http://folk.uio.no/karinlag
> 
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