From: Schrom, Brian T (brian.schrom_at_[hidden])
Date: 2007-07-31 11:43:45
In some plotting applications I have, it is quite useful to be able to
reuse the X values,
i.e.
std::vector<double> x; // few million data points
std::vector<double> y1;
std::vector<double> p2;
...
plotXY( x, y1 );
plotXY( x, y2 );
So this type of interface may be nice to provide too, in addition to
plotting maps.