Arrangement of Lattice Histograms - Top to bottom and then left to right?

Look for the index.cond argument at the bottom of the Help page for xyplot.
-- Bert

On Tue, Apr 5, 2011 at 11:37 AM, Les <lnharris at zoology.ubc.ca> wrote:

Hi List,
Using Lattice, I have created a plot of histograms showing Fork Length by
Year. The plot shows the histograms in 3 columns and 5 rows. Using the
as.table=T function I can get the years to start on top. However, what I
would like to do is have the first year start in the top left (column 1, row
1; as it is now) and add the subsequent histograms to the plot going down
the column and then over by row (example and current code is shown below).
Is this possible? I have spent a great deal of time searching, and have not
found any clues. Any help/ideas would be greatly appreciated.

For example, what is being done now:

1974 1975 1976
1977 1978 1979
1980 1981 1982

and what I am hoping for:

1974 1977 1980
1975 1978 1981
1976 1979 1982

Thank you kindly,
Les

data=read.csv("AllData.csv",sep=",",header=T)
data$year=as.factor(data$year)
ferg=data[data$wtrbody=="Ferguson",c(1:12)]
library(lattice)

strip.background=trellis.par.get("strip.background")
trellis.par.set(strip.background = list(col = grey(7:1/8)))

histogram(~fl|year, data=ferg, as.table=T, type="count",
? ? ? ?col='dark grey',layout=c(3,5),lwd=2, lty=1,
? ? ? ?xlab=list("Fork Length (mm)", cex=1.4,font=2),
? ? ? ?breaks=seq(from=300,to=900,by=25),
? ? ? ?ylab=list("Frequency",cex=1.4,font=2),
? ? ? ?scales=list(font=2,cex=1.1, tck=c(1,0), alternating=1,
? ? ? ?y=list(relation="free",tick.number=3)),
? ? ? ?par.strip.text=list(cex=1.2),font=2,
? ? ? ?aspect=0.6)

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--
"Men by nature long to get on to the ultimate truths, and will often
be impatient with elementary studies or fight shy of them. If it were
possible to reach the ultimate truths without the elementary studies
usually prefixed to them, these would not be preparatory studies but
superfluous diversions."

-- Maimonides (1135-1204)

Bert Gunter
Genentech Nonclinical Biostatistics