Hi,

Wondering what the best method might be to create a heat map chart where the user can easily change the min / max values of the colour gradient and have that change be updated in the chart as quick as possible.

One way to do this is simply to give the user a couple of boxes to enter the desired max and min values, then regenerate hte chart based on that input but that seems a bit clunky.

Ideally I'd have some kind of slider bar that the user could move up and done and the colours on the map would shift accordingly (if anyone has an envision plate reader that software has functionality similar to what I'm thinking of).

Not sure if this can be coded as the heat map is a png image. Don't know enough about flash to guess if that would be an option.

Any thoughts anyone?
Thanks Tris