[R] setting color ranges

From: samsr <sameet.sreenivasan_at_gmail.com>
Date: Thu, 14 Feb 2008 12:59:15 -0800 (PST)

Hi,

 I need to plot a matrix using image() such that negative values are easily distinguishable from posittive values, while also maintaining a gradation in color with magnitude. How can I set ranges for colors in order to achieve this. Thanks.

Sam

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