[R] data manipulation for plotting
Gavin Simpson
gavin.simpson at ucl.ac.uk
Thu Feb 14 15:48:06 CET 2008
On Thu, 2008-02-14 at 14:35 +0000, rich at thevillas.eclipse.co.uk wrote:
> Hi,
>
> i'd like to plot some data that I have with the value on the x axis and freq
> on the y axis.
>
> So, I need to calculate the freq a value is seen within my data vector
>
> for example, say i have a vector of data
>
> data=c(1,1,1,4,5,5,6)
Don't call your data 'data' ;-)
install.packages("fortunes")
library(fortunes)
fortune("dog")
>
> I want
>
> values<-c(1,4,5,6)
>
> freq<-c(3,1,2,1)
use ?unique and ?table
my.dat <- c(1,1,1,4,5,5,6)
values <- unique(my.dat)
values
tab <- table(dat)
tab
freq <- as.numeric(tab)
freq
plot(tab) # for one way of plotting what you want
plot(freq ~ values) # for another
HTH
G
>
> in order to enable me to plot this. Sorry, i'm new to R. What is standard
> procedure here for plotting the data vector?
>
> cheers
>
> Rich
>
>
>
>
>
>
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Dr. Gavin Simpson [t] +44 (0)20 7679 0522
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