[R] pdf files in loops

[James Rome]

On 3/31/2010 10:01 PM, Berwin A Turlach wrote:

G'day James,

On Wed, 31 Mar 2010 21:44:31 -0400
James Rome <jamesrome at gmail.com> wrote:


> I need to make a bunch of PDF files of histograms. 
>   
[...]

> What am I doing wrong?
>   
http://cran.ms.unimelb.edu.au/doc/FAQ/R-FAQ.html#Why-do-lattice_002ftrellis-graphics-not-work_003f

HTH.

Cheers,

	Berwin

========================== Full address ============================
Berwin A Turlach                      Tel.: +61 (8) 6488 3338 (secr)
School of Maths and Stats (M019)            +61 (8) 6488 3383 (self)
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Crawley WA 6009                e-mail: berwin at maths.uwa.edu.au
Australia                        http://www.maths.uwa.edu.au/~berwin

print() did not help, and I get strange messages about mode(onefile) not
being changed:
+     outfile = paste("../", airport, "/", airport, "taxiHistogram",
gate, ".pdf", sep="")
+     pdf(file = outfile, width = 10, height=8, par(lwd=1))           
+     title=paste("Taxi time for Arrival Gate", gate, "by Runway at",
airport)
+     gdf = mdf[mdf$ArrivalGate == gate, ]
+     gdf$tt= gdf$TaxiTime/60           
+     histogram(~(gdf$tt) | gdf$Runway, data=gdf, type="count",
ylab="Count",    breaks=20, main=title, xlab="taxi time (min)", 
par.strip.text=list(cex=0.7))
+     print()
+     dev.off()           
+ }
Warning: 'mode(onefile)' differs between new and previous
     ==> NOT changing 'onefile'
Error in print.default() : element 1 is empty;
   the part of the args list of '.Internal' being evaluated was:
   (x, digits, quote, na.print, print.gap, right, max, useSource, noOpt)
>

I would actually like all the histograms in one pdf file too...