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statistics: clip regression line

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A steep regression line would shoot out of the chart. Therefore,
clip to the y = minY and y = maxY lines.

QtGraphicsScene has its own clipping routines, but they are
very general, so let's do this trivial case by hand.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2021-01-03 18:57:43 +01:00 • committed by Dirk Hohndel
parent 9beec46e22
commit bea289e314
2 changed files with 21 additions and 3 deletions
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2
stats/statsview.h
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@ -110,7 +110,7 @@ private:
LineMarker(QPointF from, QPointF to, QPen pen, QtCharts::QAbstractSeries *series);
};
void addLinearRegression(double a, double b, double minX, double maxX, QtCharts::QAbstractSeries *series);
void addLinearRegression(double a, double b, double minX, double maxX, double minY, double maxY, QtCharts::QAbstractSeries *series);
void addHistogramMarker(double pos, double low, double high, const QPen &pen, bool isHorizontal, QtCharts::QAbstractSeries *series);
StatsState state;