View Full Version : Scatter plot with many colors
DKL1972
28th June 2008, 04:37
How would I go about creating a Scatter Plot (QwtPlotCurve with a NoCurve style and a QwtSymbol) using many colors for the symbols instead of just one?
Thanks.
What is the meaning of the colors in your case ?
Uwe
DKL1972
28th June 2008, 15:30
Hello.
I am trying to use color intensity to represent different values at a specific point (a third dimension).
Thanks.
DKL1972
28th June 2008, 16:56
The only way I came up with is to implement my own MyCurvePlot and override drawSymbols with my own colors before drawing each symbol. Is this the best way?
Thanks.
Yes, it is.
A special curve that displays 3D points, where the z-value is mapped to a color using a QwtColorMap is on my TODO list for Qwt 5.2. Maybe have a look at the QwtSeriesItem/QwtSeriesData templates in SVN trunk ( = 5.2 branch ), that make such an implementation much easier, than with Qwt 5.1.
Uwe
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