[R] using jpeg() in BATCH mode

[Peter Dalgaard BSA]

Evan Zane Macosko <macosko at fas.harvard.edu> writes:

> So I tried using the dev2bitmap function, and I get an empty file.  Here
> is my batch script(simplified):
> 
> angles<-scan("tempout.txt");
> hist(angles);
> filename<-c("/var/www/html/histograph.png");
> dev2bitmap(filename, type = "png256", height = 4, width = 4, res = 65,
> pointsize = 10);
> 
> 
> Any suggestions on why this doesn't work?

You didn't read what Brian wrote:

> > Under Unix, to use jpeg() you need to start R with the X11 gui, and BATCH
> > does not.  bitmap() works though ...
               ^^^^^^^^
There's no "dev to bitmap" when you get there, try

angles<-scan("tempout.txt")
filename<-c("/var/www/html/histograph.png")
bitmap(filename, type = "png256", height = 4, width = 4, res = 65,
  pointsize = 10)
hist(angles)
dev.off()

BTW: This is R, not Perl or SAS. You don't need semicolon at end of
lines.

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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