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

Les lnharris at zoology.ubc.ca
Tue Apr 5 20:37:09 CEST 2011


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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