       Re: ColorFunction Range (Mathematica v7)

• To: mathgroup at smc.vnet.net
• Subject: [mg99958] Re: ColorFunction Range (Mathematica v7)
• From: dh <dh at metrohm.com>
• Date: Wed, 20 May 2009 04:59:07 -0400 (EDT)
• References: <guu2l8\$6d8\$1@smc.vnet.net>

```
Hi Constantinos,

try:

DensityPlot[f[x, y], {x, 0, 1}, {y, 0, 1},

ColorFunctionScaling -> True]

DensityPlot[f[x, y], {x, 0, 1}, {y, 0, 1},

ColorFunctionScaling -> False]

In the first case, the color function receives a scaled argument in the

range [0,1]. If  ColorFunctionScaling -> False, the color function

receives the actual value of the function, in our case: [0,2], giving

the same color if the value is larger than 1.

You can convince yourself by e.g. changing the color function to:

ColorFunction -> (Hue[Mod[#, 1]] &)

Daniel

Constantinos wrote:

> Hi All,

>

> Does anyone know how I can change the "Range" value of a preset

> ColorFunction (e.g. "TemperatureMap") in DensityPlot?

>

> I am facing the following problem:

>

> Let's say that the min and max values of your plotting function (not the

> color one) are fmin and fmax, respectively. Let's also assume that you set

> PlotRange->{pmin,pmax}.

> If pmax is lower than fmax then the highest valued color (Red) corresponds

> to pmax but if pmax is higher than fmax the highest valued color (Red)

> corresponds to fmax. Note that we have similar situation for the minimum

> values fmin and pmin.

>

> How can I assign the highest (lowest) valued color of a preser ColorFunction

> to the desired value whatever it is.

>

>

>

> Constantinos

>

>

>

>

```

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