[R] Re: gray background on jpegs using dev.print()

John Muller jmuller at mindspring.com
Thu Apr 1 18:25:24 CEST 2004

I get the gray background when I use plot to write to the screen
and then try to write the screen contents to a file using

     dev.print(jpeg, file="H:/Secondary/cycle_time/test.jpg",width=800,quality=100,bg="white") ;

I have also tried using bg = "#FFFFFF" instead of bg="white"
and have also tried using par to set the background color as in 
    par(bg="#FFFFFF") ;
    dev.print(jpeg, file="H:/Secondary/cycle_time/test.jpg",width=800,quality=100,bg="white") ;

None of these seem to affect the background color of the jpeg image.

- john

-----Original Message-----
From: John Muller <jmuller at mindspring.com>
Sent: Apr 1, 2004 11:05 AM
To: r-help at stat.math.ethz.ch
Subject: gray background on jpegs using dev.print()

When I try writing the current device to a jpeg file I keep getting a gray background
for the jpeg images using dev.print.

I have tried using the option bg="white" and bg="#FFFFFF"
but neither seem to have any effect.

If instead of writing to a screen device I open a jpeg device I can get any background color
I want.  This works, but I prefer to write to the screen and then 
output to file if I like the results rather than to a file and have to view the jpegs
to see results.

I am using R version 1.8.1 on Windows 2000.

Has anyone else had this problem?
If so please let me know, especially if you found a better workaround or a fix.

- john muller

More information about the R-help mailing list