I realize this is a fairly old thread, but it ended without much resolution. If there is anyone out there still interested in drawing heat maps, I have an implementation that might be worth checking out.
http://michaelvandaniker.com/blog/2008/07/06/how-to-make-heat-maps-in-flex/ --- In [email protected], "Nate Pearson" <[EMAIL PROTECTED]> wrote: > > That makes sense :). How would I get those cool color blending > effects in the examples above? If I were to do it now I would just > draw a red circle or square if the threshold were between 15 and 20... > > Here's something that's pretty close to what I want to do. > http://universalmind.com/demo/launchpad.cfm > > At 4:19 in the video they switch to a heat map view. Before that they > just lay down little circles, which I can do. > > Maybe when they switch to the heat map view they just take their > circles and add a lot of glow and blur to them and up the opacity to > the outer colors (blue and green)...what do you guys think? > > --- In [email protected], "Abyss Knight" <briggins@> wrote: > > > > 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" <napearson99@> 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}