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Re: Documentation on (Color) Blend

  • To: mathgroup at smc.vnet.net
  • Subject: [mg111294] Re: Documentation on (Color) Blend
  • From: Patrick Scheibe <pscheibe at trm.uni-leipzig.de>
  • Date: Mon, 26 Jul 2010 06:39:36 -0400 (EDT)

Hi,

you don't need the (buggy) sample with the Table. Just read a bit in the
Blend documentation and eventually do something like

DensityPlot[x, {x, -1, 1}, {y, 0, 1}, FrameTicks -> None, 
 ColorFunction -> (Blend[{{0, Green}, {0.4, White}, {0.6, White}, {1, 
       Red}}, #] &)]

Cheers
Patrick

On Sun, 2010-07-25 at 01:58 -0400, telefunkenvf14 wrote:
> Group:
> 
> The documentation on Blend[], in the "Possible Issues" section,
> contains the following example.
> 
>  ----------------
> In plot functions, use ColorFunctionScaling to control global scaling
> of variables:
> 
> Table[DensityPlot[x, {x, -2, 3}, {y, 0, 1}, FrameTicks -> None,
>   ColorFunction -> (Blend[{Red, Green}, #] &),
>   ColorFunctionScaling -> t], {t, {False, True}}]
>  ----------------
> 
> I noticed that when I evaluate the code, the original output is not
> reproduced. On my machine the new plots look exactly the same.
> (Windows 7, 64-bit, Mathematica 7.0.1)
> 
> Can someone offer a fix? My goal is to generate a Green to White to
> Red spectrum with a 'fuzzier' center; eventually I'll use this for
> coloring a map.
> 
> -RG
> 



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