It's been a very long time since I've worked with this sort of thing, but I would imagine you would first generate a histogram of all the possible concentrations and then map that into the color set you want to show (just putting everything into colored buckets). That way with any data set the variations are shown in different colors. Now, if you wanted to do simple thresholding (i.e. 15 < x < 20 is red) you could just iterate over the grid cells or whatever the division is.
I hope that helps. I may be completely misunderstanding you or making absolutely no sense. If so, please forgive me. :) -- William --- In [email protected], "Nate Pearson" <[EMAIL PROTECTED]> wrote: > > I'm good at extending UIComponent and making custom things...I just > want to know conceptually how people would do it. Even if you've done > this in a different language that's fine. I think both of you are > thinking more about a grid than a map. > > I think I explained it poorly. > > Here's a pic of what I'm looking for. In this one it shows web page, > but I would just overlay the same thing over a map. > > <img > src="http://www.itmanagement.earthweb.com/img/Liv-050301-Heatmap.jpg"/> > > > --- In [email protected], Jehanzeb Musani <jehanzeb_bs@> > wrote: > > > > Hello, > > > > I am not dead sure how one can do it in Flex as I am > > relative a newbie in Flex application development. > > However, I am working for a financial solutions > > provider in Dubai and we have designed heatmap > > component in .NET. We used custom rendering (GDI+) to > > draw this control in .NET. > > > > I believe you can do the same in Flex. If you are > > familiar with Flash or even if you know Flex Drawing > > API, you can opt custom rendering tu built this > > control. In my opinion, it will be better than > > implementing this functionality using datagrid. > > > > Hope this helps. > > > > Regards, > > Jehanzeb > > > > --- Nate Pearson <napearson99@> wrote: > > > > > I'm thinking about making a heat map overlay. I'm > > > not sure how to go > > > about it though. Does anyone have any ideas? > > > > > > Lets say you have a grid, the more points you have > > > in one place the > > > more red it is in that place, less would be yellow, > > > then green, then blue. > > > > > > I don't know how I would code this though.... > > > > > > Any help is appreciated. > > > > > > > > > > > > __________________________________________________ > > Do You Yahoo!? > > Tired of spam? Yahoo! Mail has the best spam protection around > > http://mail.yahoo.com > > >
![http://www.itmanagement.earthweb.com/img/Liv-050301-Heatmap.jpg"/](http://www.itmanagement.earthweb.com/img/Liv-050301-Heatmap.jpg"/){kind=link}