重心有理插值精度高,且无极点,采用不同的权得到不同的重心有理插值。本文使用切比雪夫点作为插值节点,选取最优插值权来构造重心有理插值。新方法所得插值具有非常高的精度,通过数值实例表明了新方法的有效性。
Barycentric rational interpolation is accurate and have no poles.For different weight,barycentric rational interpolation has different accuracy.Based on the best weights and the Chebyshev points,the accurate barycentric rational interpolation is studied.Two numerical examples are given to show the effectiveness of the new method.