Dear listers,
I would like to report an issue I had today, while plotting text on a
map.
I am using Mac OS 10.5.8 and R 2.10.1 (same problem with R and R64.
Plus, see sessionInfo below).
The map is based on the data in the "maps" library.
The plotted text corresponds to concatenated text and numbers; the
data coming from a csv spreadsheet.
In addition to the error messages reported below, the plotted text has
a font that looks very crude, and exporting the map as a PDF results
in a file > 48 MB that crashes Preview and Acrobat. I did tests for
which only the map was plotted (no problem), and only points were
plotted (no problem, although the font of the points is not as smooth
as it could be).
I did a search on the R list for the error message I received, with no
success. However, I did find some mac-related posts that have to do
with Cocoa development, so this probably is a mac-related issue (the
answer to these posts were completely over my head, unfortunately...)
In the error message, I replaced the address of my computer by
"ADDRESS".
> read.csv("METADATA_SPB_COORD_02-01-10.csv", header=T) ->
metadata.coord.cd
> library(maps) ; states <- data.frame(map("state", plot=FALSE)
[c("x","y")])
> plot(states,type="l", xlim=c(-105,-72), ylim=c(25,40))
>
> for(i in 1:length(metadata.coord.cd[,1])){
+ t = paste(metadata.coord.cd$St.name,metadata.coord.cd$CD.num,sep="")
+ text(metadata.coord.cd$CENTER.LONG, metadata.coord.cd$CENTER.LAT,
t, cex=0.7)
+ }
Mon Mar 1 13:02:38 ADDRESS R[489] <Error>: CGContextSetFont: invalid
context
Mon Mar 1 13:02:38 ADDRESS R[489] <Error>: CGContextSetFontSize:
invalid context
Mon Mar 1 13:02:38 ADDRESS R[489] <Error>: CGContextGetFont: invalid
context
> sessionInfo()
R version 2.10.1 (2009-12-14)
x86_64-apple-darwin9.8.0
locale:
[1] en_US.UTF-8/en_US.UTF-8/C/C/en_US.UTF-8/en_US.UTF-8
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] maps_2.1-0
loaded via a namespace (and not attached):
[1] tools_2.10.1
Insights would be much appreciated!
Best regards, eric pante
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