---
name: "QwtCurveFitter"
section: "3"
platform: "linux"
package: "libqwt-doc"
version: "6.1.4-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/QwtCurveFitter"
---

# QwtCurveFitter(3)

Abstract base class for a curve fitter.

## NAME

QwtCurveFitter - Abstract base class for a curve fitter.

## SYNOPSIS

`#include <qwt_curve_fitter.h>`

Inherited by **QwtSplineCurveFitter**, and **QwtWeedingCurveFitter**.

### Public Member Functions

virtual **~QwtCurveFitter** ()\
 Destructor.  virtual QPolygonF **fitCurve** (const QPolygonF &polygon) const =0\

### Protected Member Functions

**QwtCurveFitter** ()\
 Constructor.

## Detailed Description

Abstract base class for a curve fitter.

## Member Function Documentation

### virtual QPolygonF QwtCurveFitter::fitCurve (const QPolygonF & polygon) const` [pure virtual]`

Find a curve which has the best fit to a series of data points

**Parameters:**

*polygon* Series of data points

**Returns:**

Curve points

Implemented in **QwtWeedingCurveFitter**, and **QwtSplineCurveFitter**.

## Author

Generated automatically by Doxygen for Qwt User's Guide from the source code.