[Rd] problems with bitmap images in windows XP

[Kjetil Brinchmann Halvorsen]

This is rw2000 on windowsXP

 jpeg("test.jpeg", bg="orangered")
 plot(1:10, 1:10, col="green")
 dev.off()

------

jpeg("test.jpeg", bg="blue")
 plot(1:10, 1:10, col="red")
 dev.off()

-------

 jpeg("test.jpeg", bg="green")
 plot(1:10, 1:10, col="red")
 dev.off()

---

jpeg("test.jpeg", bg="white")
 plot(1:10, 1:10, col="red")
 dev.off()

Now, all of this gives a bluish background when wieved with Windows 
Picture and Fax wiever or with the GIMP-2.0
The bg= argument does not seem to have any effect.

Now repeating in rw191:

jpeg("test.jpeg", bg="orangered")
 plot(1:10, 1:10, col="blue")
 dev.off()

and the background is blue (not the same "bluish" as above)

jpeg("test.jpeg", bg="blue")
 plot(1:10, 1:10, col="red")
 dev.off()

and the background color is red.

Similar symptoms with the other bitmap devices.

The only mention about bitmap devices in the NEWS file for R2.0.0 is

 o    The png() and jpeg() devices (and the bmp() device under Windows)
    now allow a nominal resolution to be recorded in the file.

So what has happened?

Kjetil




-- 

Kjetil Halvorsen.

Peace is the most effective weapon of mass construction.
               --  Mahdi Elmandjra