Return the order of a spline object.
返回一个样条线对象的顺序。
用法----------Usage----------
splineOrder(object)
参数----------Arguments----------
参数:object
An object that inherits from class "spline".
一个对象类"spline"继承。
Details
详情----------Details----------
The order of a spline is the number of coefficients in each piece of the piecewise polynomial representation. Thus a cubic spline has order 4.
样条线的顺序是每片分段多项式表示的系数。因此,三次样条4阶。