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0001 # KPlotting
0002 
0003 Data plotting
0004 
0005 ## Introduction
0006 
0007 KPlotWidget is a QWidget-derived class that provides a virtual base class
0008 for easy data-plotting. The idea behind KPlotWidget is that you only have
0009 to specify information in "data units"; i.e., the natural units of the
0010 data being plotted.  KPlotWidget automatically converts everything
0011 to screen pixel units.
0012 
0013 KPlotWidget draws X and Y axes with tick marks and tick labels.  It
0014 automatically determines how many tick marks to use and where they should
0015 be, based on the data limits specified for the plot.  You change the limits
0016 by calling `setLimits(double x1, double x2, double y1, double y2)`.
0017 
0018 Data to be plotted are stored using the KPlotObject class.  KPlotObject
0019 consists of a QList of QPointF's, each specifying the X,Y coordinates
0020 of a data point.  KPlotObject also specifies the "type" of data to be
0021 plotted (POINTS or CURVE or POLYGON or LABEL).
0022