R help - May 2005 - How to convert color to black & white

Dear all,
Could someone please explain to me how to convert color to black & white.
For example:
barplot(1:5,col = rainbow(5))
Because I need to print my plot to save my ink color printer.
I don't want to convert to grayscale, but keep it as an RGB.
I  would be very happy if anyone could help me.
Thank you very much in advance.

Kindly regards,
Muhammad Subianto

Muhammad,
Here's one option:

barplot(1:5,col=gray(seq(0,1,length=5)))

Norm Olsen
Fisheries and Oceans Canada

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
To: R-help at stat.math.ethz.ch
Sent: 5/13/2005 11:40 AM
Subject: [R] How to convert color to black & white

Dear all,
Could someone please explain to me how to convert color to black &
white.
For example:
barplot(1:5,col = rainbow(5))
Because I need to print my plot to save my ink color printer.
I don't want to convert to grayscale, but keep it as an RGB.
I  would be very happy if anyone could help me.
Thank you very much in advance.

Kindly regards,
Muhammad Subianto

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