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// A regression line and confidence area
#ifndef REGRESSION_H
#define REGRESSION_H
#include "chartitem.h"
class StatsAxis;
class StatsView;
struct regression_data {
double a,b;
double res2, r2, sx2, xavg;
int n;
};
class RegressionItem : public ChartPixmapItem {
public:
RegressionItem(StatsView &view, regression_data data, StatsAxis *xAxis, StatsAxis *yAxis);
~RegressionItem();
void updatePosition();
private:
StatsAxis *xAxis, *yAxis;
regression_data reg;
};
#endif
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