假设我有一个双打数组,使用Akima interpolation对这个系列进行采样的好算法是什么?将这个数学描述翻译成代码我太愚蠢了。
// values is an array of doubles
// idx is the index of the left-hand value for the current interpolation
// t is the normalized parameter between values[idx] and values[idx+1]
// Don't worry about array bounds, I'll handle that separately.
public double InterpolateAkima(double[] values, int idx, double t)
{
...?
}
答案 0 :(得分:27)
重新发布并扩展我对another SO question的回复,该回复已作为此问题的副本而关闭 - 正如对该问题的评论所暗示的那样。
Akima的原始论文: ``一种新的插值方法和基于局部程序的平滑曲线拟合'',期刊ACM 17,14(1970),589-602
http://www.leg.ufpr.br/lib/exe/fetch.php/wiki:internas:biblioteca:akima.pdf
C实施
https://github.com/ampl/gsl/blob/master/interpolation/akima.c
C#实施
https://gist.github.com/dreikanter/3526685
Delphi实现(参见delphi / src / spline3.pas中的BuildAkimaSpline过程)
http://www.alglib.net/translator/re/alglib-2.6.0.delphi.zip
Akima的Fortran 66实施
http://cran.r-project.org/web/packages/akima/
Fortran 90实施
http://miyoshi.googlecode.com/svn-history/r72/trunk/common/common.f90
Java实现
Lisp实现"用于AutoCAD 2d-Polylines"
http://autocad.xarch.at/code/candido/akima.lsp
Matlab实现
http://www.mathworks.se/matlabcentral/fileexchange/1814-akima-interpolation
Pascal实施(program description)
http://jean-pierre.moreau.pagesperso-orange.fr/Pascal/akima_pas.txt
Python实现
http://www.lfd.uci.edu/~gohlke/code/akima.py.html
VB6实现(参见vb6 / src / spline3.bas中的子程序BuildAkimaSpline)
http://www.alglib.net/translator/re/alglib-2.6.0.vb6.zip
http://www.koders.com/cpp/fid1393B9D668316C1700966643DE0609660B9CB13A.aspx?s=%22Brian+Smith%22
答案 1 :(得分:7)