自行编写的三次样条插值函数源代码，并针对具体问题编写了程序求解-prepared by the self-cubic spline interpolation function source code, and issue-specific procedures for the preparation of the

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在matlab中用自然边界条件画小狗， P155 Q 28，数值分析-Draw a dog by natural cubicspline interpolation in matlab, P155 Q 28， numeriacal analysis