On Feb 11, 2012, at 6:25 PM, Adel ESSAFI wrote:
Le 11 février 2012 02:33, David Winsemius <dwinsem...@comcast.net> a
écrit :
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 )
Thanks ,
that helped a lot.
now, I have another problem: I want to draw many (two) figures
together.
The par(new=T) directve does not recognize the ploy provided by
lattice library
Par is for base graphics. xyplot is part of lattice and grid graphics.
when I tired :
> xyplot(law[,66] ~ law[,3]| interaction(law[,1],law[,2]),type='l')
> par(new=T)
Warning message:
In par(new = T) : calling par(new=TRUE) with no plot
> xyplot(law[,67] ~ law[,3]| interaction(law[,1],law[,2]),type='l')
and the second xyplot() draws a new figure.
what can I do to draw to figures together using lattice?
You need to describe what you mean by "together". It is possible that
the goup parameter is what you want but that's just a guess. It's also
possible that the formular operator "+" will give you what you desire.
Perhaps:
xyplot( law[,67] + law[,66] ~ law[,3]| interaction(law[,1],law[,
2]),type='l')
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
That doesn't make any sense to me. But then I do apologize for the
English language. It's horribly complex and syntactically a mess.
Thanks in advance for help
Adel
--
David Winsemius, MD
West Hartford, CT
--
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
David Winsemius, MD
West Hartford, CT
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