读取3D数据，对3D数据进行插值运算并转换为二维数组-read 3D data a txt document, then process these data with interpolation algorithm

Labview中实现三次样条插值的，可以进行简单的插值运算，运行简单，运算快速准确- Spline in labview, by using this you can get the accurate value of spline function of a set of data