Hanno, I wrestled with this one for a while. The attached script is the result of my effort. The two keys were to define the colormap, and then make sure that when you call the colormap that the values span the full range. For example, if you want a data point to be "yellow", and that color (RGB: 1,1,0) is between 0.75 and 0.85 on your colormap, then give the point a value of 0.81 (or whatever in the range). Then be sure to also pass a zero (0.0) and a one (1.0) to the scatter. By spanning the full scale range you will be sure to fix the color that you want from the colormap to the data point that you define. It might be a hack, but it works ok.
Cheers, Jake -----Original Message----- From: Louis Pecora [mailto:[EMAIL PROTECTED] Sent: Friday, October 13, 2006 7:47 AM To: matplotlib-users@lists.sourceforge.net Subject: Re: [Matplotlib-users] plot x y value(x,y) Hanno Klemm wrote: > Hi Louis, > > sorry for being unclear. What I have is a list of data points given in > the format > > x y value > > so my array looks like > > x_1, y_1, v_1 > x_2, y_2, v_2, > > etc. > > Now I want to plot a point at (x_i, y_i) and assign to it a color > according to v_i. The problem is, that the values at x and y are given > and are not calculated. > > Christian's suggestion with a scatter plot works fine for me, but if > there are other possibilities I'm always keen to learn something. > > Hope this clarifies matters. > > Best regards, > Hanno > > Got it. Yes, sounds like you want a "3D" scatter plot. v (at some "height) over the surface of x,y points. There is a contour in matplotlib, but I don't think it will do what you want. I will go back and look over matplotlib. You might want to go to the matplotlib web site and download the examples. There are tons of them. Maybe one is right for you. -- Cheers, Lou Pecora Code 6362 Naval Research Lab Washington, DC 20375 USA Ph: +202-767-6002 email: [EMAIL PROTECTED]
fixed_color_scatter.py
Description: fixed_color_scatter.py
fixed_color_scatter.png
Description: fixed_color_scatter.png
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