Re: [Matplotlib-users] Using color in fill

[Perry G. <pe...@st...>]

Yes, colormaps are callable so you can call the colormap with either a 
scalar value or an
array of values and what will be returned is a tuple of rgba values or 
an array (shape
= 4, nelements). See the docstring on __call__ for 
LinearSegmentedColormap in colors.py

Perry

On Jan 6, 2005, at 3:18 PM, Carol Leger wrote:

> I am using fill to make filled polygons.  I want to fill the polygons 
> with colors that reflect data values, similar to what imshow does.
>
> Is there a way to extract the rgb tuples from a Colormap? This could 
> be an array of N tuples, each tuple containing 3 0-1 floats that 
> describe the color or three separate arrays, one each for red, green 
> and blue.
>
> I made the mistake of using some non-public attributes of the class 
> colorMap to accomplish this in a previous version of matplotlib.  That 
> was a mistake since Colormap._red_lut, Colormap._green_lut and 
> Colormap._blue_lut no longer exist.
>
> Once I have the array of tuples, I can determine which one I want and 
> create a hex string using rgb2hex to get a color suitable for use with 
> fill.
>
> I need the flexability to make the same plot using several different 
> color maps.
> -- 
> Ms. Carol A. Leger
> SRI International			Phone: (650) 859-4114
> 333 Ravenswood Avenue G-273
> Menlo Park, CA 94025                    e-mail: le...@sr...
>
>
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