- java.lang.Object
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- ij.measure.SplineFitter
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public class SplineFitter extends java.lang.Object
This class interpolates a set of points using natural cubic splines (assuming zero second derivatives at end points). Given a set of knots x (all different and arranged in increasing order) and function values y at these positions, the class build the spline that can be evaluated at any point xp within the range of x. It is based on the publication Haysn Hornbeck "Fast Cubic Spline Interpolation" https://arxiv.org/abs/2001.09253 Implemented by Eugene Katrukha (katpyxa@gmail.com) to fit the layout of SplineFitter class of ImageJ
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Constructor Summary
Constructors Constructor Description SplineFitter(float[] x, float[] y, int n)
SplineFitter(float[] x, float[] y, int n, boolean closed)
For closed curves: the first and last y value should be identical; internally, a periodic continuation with a few will be used at both endsSplineFitter(int[] x, int[] y, int n)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description double
evalSpline(double xp)
Evalutes spline function at given pointdouble
evalSpline(float[] x, float[] y, int n, double xp)
double
evalSpline(int[] x, int[] y, int n, double xp)
provides interpolated function value at position xp
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Constructor Detail
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SplineFitter
public SplineFitter(int[] x, int[] y, int n)
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SplineFitter
public SplineFitter(float[] x, float[] y, int n, boolean closed)
For closed curves: the first and last y value should be identical; internally, a periodic continuation with a few will be used at both ends
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SplineFitter
public SplineFitter(float[] x, float[] y, int n)
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Method Detail
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evalSpline
public double evalSpline(double xp)
Evalutes spline function at given point
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evalSpline
public double evalSpline(int[] x, int[] y, int n, double xp)
provides interpolated function value at position xp
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evalSpline
public double evalSpline(float[] x, float[] y, int n, double xp)
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