[R] multiple histograms from a dataframe

[David Winsemius]

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