
Great, I will have a look at it!

Thanks!

On Mon, Dec 27, 2010 at 12:52 PM, Jim Lemon [via R]
<ml-node+3164904-680716452-206738@n4.nabble.com> wrote:
> On 12/27/2010 02:21 PM, randhindi wrote:
>>
>> Hi,
>>
>> I am trying to set the color scale in filled.contour based on a specific
>> value instead of a relative position.
>> Specifically, I want the values below 0 to be in a gradient of green, and
>> those above 0 to be red. 0 would be white.
>>
>> I tried:
>>
>> posZero = abs(min(z)) / (abs(min(z)) + max(z));
>> filed.contour(..., col = designer.colors(n=30, col=c("green", "white",
>> "red"), x=c(0, posZero, 1)))
>>
>> but it does not center the white on the zero.
> Hi Rand,
> Have a look at the examples for color2D.matplot in the plotrix package.
> These show how to use color.scale to produce a set of colors like you
> describe above.
>
> Jim
>
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