[R] stacked bar plot

[Greg Snow]

You can use the tapply function to sum within combinations, then pass the results to barplot (possibly doing a reshape first).

Also look at the ggplot2 package, it may do the summing as part of the plot call and probably does not need the reshape step.

-- 
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 Chandra Salgado Kent
> Sent: Tuesday, March 22, 2011 1:30 AM
> To: r-help at r-project.org
> Subject: [R] stacked bar plot
> 
> Hello,
> 
> 
> 
> I'm wondering if someone may be able to help me, and do apologize if
> there is a simple and obvious solution for this. I am somewhat new to
> R, and have been searching for a simple solution for a couple of days.
> 
> 
> 
> I am interested in finding a tool that allows me to plot a stacked bar
> plot.
> 
> 
> 
> My data set is in the following format:
> 
> data<-data.frame(Sex=c("M","F","M","F","F"), Number=c(10,3,1,2,3),
> Group_size=c(1,1,2,2,2))
> 
> 
> 
> I would like to have the factor "Sex" stacked, "Group size" as a Factor
> on the X axis, and "Number" on the Y axis (summed so that there is only
> one value for each Sex by Group_size combination).
> 
> 
> 
> Many, many thanks for any help you may be able to offer!
> 
> 
> 
> Chandra
> 
> 
> 	[[alternative HTML version deleted]]
> 
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