On 07/20/2011 01:56 PM, Stratford, Jeffrey 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.
Hi Jeff,
I think this could be done with the barNest function, nesting the year
bars within the parasite bars. If you can't figure it out, send the
complete dataset and I can provide an example.
Jim
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