这是牛顿插值法的代码。此代码岁简洁，但是真实的反应了牛顿插值的理论。让我们可以更深刻的理解牛顿插值法-This is the Newton interpolation code. This code-year-old compact, but the real response to the Newton interpolation theory. So that we can gain a deeper understanding of Newton interpolation