FittingCurve Class Reference

Curve that overlays the current scene so the regression-fitted curve is visible. More...

#include <FittingCurve.h>

Inheritance diagram for FittingCurve:

Collaboration diagram for FittingCurve:

Public Member Functions
	FittingCurve (const FittingCurveCoefficients &fittingCoef, double xMin, double xMax, bool isLogXTheta, bool isLogYRadius, const Transformation &transformation)
	Single constructor.
virtual	~FittingCurve ()

Detailed Description

Curve that overlays the current scene so the regression-fitted curve is visible.

Definition at line 16 of file FittingCurve.h.

Constructor & Destructor Documentation

FittingCurve()

FittingCurve::FittingCurve	(	const FittingCurveCoefficients &	fittingCoef,
		double	xMin,
		double	xMax,
		bool	isLogXTheta,
		bool	isLogYRadius,
		const Transformation &	transformation )

Single constructor.

Definition at line 15 of file FittingCurve.cpp.

{
  const int NUM_POINTS = 1000; // Use so many points that spline interpolation is not needed for smoothness
  const double Z_LINE = 500; // More than the z value for lines since this line takes priority, and user can hide it
 
  setZValue (Z_LINE);
  setPen (QPen (QColor (Qt::red)));
 
  QPainterPath path;
 
  if (transformation.transformIsDefined()) {
 
    for (int i = 0; i < NUM_POINTS; i++) {
 
      // Compute (x,y) point in graph coordinates
      double s = double (i) / double (NUM_POINTS - 1);
      double x = xMin + s * (xMax - xMin);
      double y = yFromCoefficientsAndX (fittingCoef,
                                        x);
 
      // The coefficients were computed assuming the x and y values were transformed if they were log scale base 10, so
      // we must compensate here in the same way
      if (isLogXTheta) {
        x = qPow (10.0, x);
      }
      if (isLogYRadius) {
        y = qPow (10.0, y);
      }
 
      // Convert to screen coordinates
      QPointF posGraph (x, y);
      QPointF posScreen;
      transformation.transformRawGraphToScreen (posGraph,
                                                posScreen);
 
      // Add point to line
      if (i == 0) {
        path.moveTo (posScreen);
      } else {
        path.lineTo (posScreen);
      }
    }
  }
 
  setPath (path);
}

~FittingCurve()

FittingCurve::~FittingCurve ( )

virtual

Definition at line 67 of file FittingCurve.cpp.

{
}

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The documentation for this class was generated from the following files:

• Fitting/FittingCurve.h
• Fitting/FittingCurve.cpp