[R] barplot for a categorial variable

[Bill.Venables at csiro.au]

Try

with(yourData, barplot(table(Type)))

or, if you really want percentages something like

with(yourData, barplot(table(Type)/length(Type)*100, ylab =
"Percentage")) 

(BTW, it would be nice to know who you are.)


Bill Venables
CSIRO Laboratories
PO Box 120, Cleveland, 4163
AUSTRALIA
Office Phone (email preferred): +61 7 3826 7251
Fax (if absolutely necessary):  +61 7 3826 7304
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mailto:Bill.Venables at csiro.au
http://www.cmis.csiro.au/bill.venables/ 

-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of kayj
Sent: Thursday, 31 July 2008 8:14 AM
To: r-help at r-project.org
Subject: [R] barplot for a categorial variable


Hi all,

I have data with several columns and rows. one of the column is "Type"
that
can be either A, B, C or D.
I need to plot the "Type" variable as a bar plot where the x axis is the
type A, B ,C or D and the y axis shows the percentage. I was not able to
get
a bar plot. it seems that I need to convert the categorial variable into
numeric values. Is there any way how to get the bar plot without doing
the
conversion,

Thanks 
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