R help - Mar 2011 - 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]]

On 03/22/2011 06:30 PM, Chandra Salgado Kent wrote:
> 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).
>
Hi Chandra,
It's a bit hard to work out exactly what you want, but try this:
 
barplot(matrix(c(10,3,NA,1,2,3),ncol=2),col=c("lightblue","pink","pink"),
  names.arg=1:2,xlab="Group
size",ylab="Number",main="Group Sex")
legend(1.6,8,c("Male","Female"),fill=c("lightblue","pink"))

now I have fudged a bit by just making the matrix contain the values in 
the right order, but if the barplot is what you want, it could get you 
started.

Jim

Hi Chandra,
You could use ggplot2:

library(ggplot2)
ggplot(dat, aes(Group_size, Number, fill=Sex)) +
  geom_bar(stat="summary", fun.y="mean")

Best,
Ista

On Tue, Mar 22, 2011 at 7:30 AM, Chandra Salgado Kent
<C.Salgado at cmst.curtin.edu.au> wrote:
> 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]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>


-- 
Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org

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]]
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-
> guide.html
> and provide commented, minimal, self-contained, reproducible code.