Hi Jeff,
One way to graph the differences between the two years for the first set of
data is via barchart(), a function equivalent to barplot in the lattice
package.
Please check if with this portion of code (and with your data) the graph you
get is quite self-explanatory.
###################################
require(lattice)
Lines<-"Parasite Year Infected
Leukocytozoon 2009 0.2564
Plasmodium 2009 0.3846
Hemoproteus 2009 0.0769
Leukocytozoon 2010 0.0562
Plasmodium 2010 0.7079
Hemoproteus 2010 0.3034
Any 2009 0.5128
Any 2010 0.7753
"
DF <- read.table(textConnection(Lines), skip=1, as.is = TRUE,
col.names=c("Parasite", "Year", "Infected")
)
barchart(
Infected ~ Parasite, data=DF,
groups=as.factor(Year),
auto.key = list(space = "bottom"),
origin=0
)
##############################
Regards,
Carlos Ortega
www.qualityexcellence.es
On Wed, Jul 20, 2011 at 5:56 AM, Stratford, Jeffrey <
jeffrey.stratf...@wilkes.edu> wrote:
> Hi everyone,
>
>
>
> I determined the presence of three types parasites in a passerine bird
> over two years. I would like to create a bar chart that shows the
> proportion infected on the y and year/parasite on the x such that each
> type of parasite is grouped together (single label) and a bar for each
> year . This would show if there have been changes in the prevalence of
> a the parasite over two years.
>
>
>
> This is the summary data:
>
>
>
> Parasite Year Infected
>
> Leukocytozoon 2009 0.2564
>
> Plasmodium 2009 0.3846
>
> Hemoproteus 2009 0.0769
>
> Leukocytozoon 2010 0.0562
>
> Plasmodium 2010 0.7079
>
> Hemoproteus 2010 0.3034
>
> Any 2009 0.5128
>
> Any 2010 0.7753
>
>
>
> Here are rows 86 to 92. Band and site were recorded differently each
> year but these are not part of any calculation.
>
>
>
> Year band site Plasmodium Hemoproteus Leukocytozoon Any
>
> 86 2010 2341-06597 1041 1 1 1 1
>
> 87 2010 2341-06598 1041 0 0 0 0
>
> 88 2010 2341-06599 1042 1 1 0 1
>
> 89 2010 2341-06600 1042 0 1 0 1
>
> 90 2009 6443 SOSP0901 0 0 1 1
>
> 91 2009 6444 SOSP0902 0 1 0 1
>
> 92 2009 6445 SOSP0903 0 0 0 0
>
>
>
> Any suggestions on how to create this plot would be greatly appreciated.
>
>
>
>
> Many thanks,
>
>
>
> Jeff
>
>
>
>
>
> *****************************************
>
> Jeffrey A. Stratford, Ph.D.
>
> Department of Health and Biological Sciences
>
> 84 W. South St.
>
> Wilkes Univertsity, PA 18766
>
> 570-332-2942
>
> http://web.wilkes.edu/jeffrey.stratford/
>
> *****************************************
>
>
>
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@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.
>
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and provide commented, minimal, self-contained, reproducible code.
