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] )

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



-- 
PhD candidate in Computer Science
Address
3 avenue lamine, cité ezzahra, Sousse 4000
Tunisia
tel: +216 97 246 706 (+33640302046 jusqu'au 15/6)
fax: +216 71 391 166

	[[alternative HTML version deleted]]

