[R] Plotting question: Problem with strwidth in 2.7.1

[Peter Dalgaard]

Lauri Nikkinen wrote:
> R users,
>
> I have a problem with function strwidth in 2.7.1. I'm trying to set
> the plot margins in a way that horizontal
> column labels will fit to the graph. tmp.t is a list of data.frame
> objects. This code works well in 2.6.0.
>
>   
I don't think this has to do with stringwidth at all:

> bmp(filename="foo.bmp",width=1038, height=820, res=1200)
> plot(0)
Error in plot.new() : figure margins too large

(width and height are in pixels, so at 1200dpi, the plotting area is
less than one inch. What did you intend?)

BTW: The fudge factor of 4.5 might be better estimated from
par(c("cin","cex","lheight")).


> ...snip..
> library(gplots)
> for (i in names(tmp.t)) {
>           bmp(filename=paste(i, "_", Sys.Date(), ".bmp", sep=""),
> width=1038, height=820, res=1200)
>           maxim <- max(strwidth(as.character(colnames(tmp.t[[i]])),
> units="inches"))*4.5
>           opar <- par(mar=c(3,maxim,2,2), bg="white", cex=1.6, oma =
> c(0, 0, 2, 0), mgp=c(3,0.5,0), xpd=TRUE)
>           colo <- c("red", "lightblue1", "orange", "yellow")
>           xmax <- max(unlist(lapply(tmp.t[i], function(x) apply(x, 2,
> sum))) + 15)
>           bar <- barplot2(tmp.t[[i]],
>                   horiz=TRUE,
>                   names.arg=as.character(colnames(tmp.t[[i]])),
>                   las=1,
>                   cex.names=0.7,
>                   cex.main=0.9,
>                   cex.axis=0.7,
>                   xlim=c(0, xmax),
>                   col=colo,
>                   plot.grid = TRUE
>                   )
>           box()
>           dev.off()
>           }
> ...snip...
>
> Now running this script I get an error message
>
> Error in plot.new() : figure margins too large
>
> I found from http://cran.r-project.org/src/base/NEWS that
>
>     o	Use of strwidth/height(units="user") (the default) is again an
> 	error before a user coordinate system has been set on the
> 	device, rather than giving nonsensical values (the effect of
> 	r31367).
>
> Does this have something to do with my problem? How should I modify my
> code to get it work in R 2.7.1?
>
> Thanks
> Lauri
>
>   
>> sessionInfo()
>>     
> R version 2.7.1 (2008-06-23)
> i386-pc-mingw32
>
> locale:
> LC_COLLATE=Finnish_Finland.1252;LC_CTYPE=Finnish_Finland.1252;LC_MONETARY=Finnish_Finland.1252;LC_NUMERIC=C;LC_TIME=Finnish_Finland.1252
>
> attached base packages:
> [1] tcltk     stats     graphics  grDevices utils     datasets  methods
> [8] base
>
> other attached packages:
> [1] TeachingDemos_2.2 tkrplot_0.0-18    gplots_2.6.0      gdata_2.4.2
> [5] gtools_2.5.0      RODBC_1.2-3
>
> loaded via a namespace (and not attached):
> [1] tools_2.7.1
>
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>   


-- 
   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark      Ph:  (+45) 35327918
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