63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
#ifndef __CTOOL_INTERPOLATE_HPP
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#define __CTOOL_INTERPOLATE_HPP
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#include "config.hpp"
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#include <inttypes.h>
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#include <gsl/gsl_interp.h>
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#include <gsl/gsl_spline.h>
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#include <vector>
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#include <utility>
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namespace CosmoTool
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{
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class Interpolate
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{
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public:
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Interpolate() : spline(0), accel_interp(0) { }
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Interpolate(double *xs, double *values, uint32_t N, bool autofree = false,
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bool logx = false, bool logy = false);
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~Interpolate();
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double compute(double x)
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throw (InvalidRangeException);
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double derivative(double x)
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throw (InvalidRangeException);
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const Interpolate& operator=(const Interpolate& a);
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uint32_t getNumPoints() const;
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void fillWithXY(double *x, double *y) const;
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double getMaxX() const;
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double getXi(int i) const { return spline->x[i]; }
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protected:
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gsl_interp_accel *accel_interp;
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gsl_spline *spline;
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bool autoFree;
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bool logx, logy;
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};
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typedef std::vector< std::pair<double,double> > InterpolatePairs;
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Interpolate buildInterpolateFromFile(const char *fname)
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throw (NoSuchFileException);
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Interpolate buildInterpolateFromColumns(const char *fname, uint32_t col1, uint32_t col2, bool logx = false, bool logy = false)
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throw (NoSuchFileException,InvalidRangeException);
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Interpolate buildFromVector(const InterpolatePairs& v);
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class FunctorInterpolate
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{
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public:
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FunctorInterpolate(Interpolate& i) : m_i(i) {}
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double eval(double x) { return m_i.compute(x); }
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double derivative(double x) { return m_i.derivative(x); }
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private:
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Interpolate& m_i;
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};
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};
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#endif
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