On Feb 10, 2012, at 7:05 PM, Adel ESSAFI wrote:
Hi list
I need some help for drawing some histograms
I have a dataframe , say,
X Y Z T
I want to draw a histogram Z-T for each value of the couple (X-Y).
When I use thus syntax
library(lattice)
histogram(law[,3] ~ law[,66] | law[,1] )
Perhaps (but untested in the absence of data);
histogram( Z ~ T | interaction(X, Y) , data=dfrmname )
it draws multiple histograms but by selecting distinct values of
law[,1]
The deal is to make the same thing but for a couple of columns
Thanks in advance for help
Adel
--
David Winsemius, MD
West Hartford, CT
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