说明：  数值分析课程设计，内附MATLAB源码和word,用三次样条插值设计中英文签名，双三次做改进； 采用交互式界面进行操作，用鼠标点击获取名字大致的数据点 三次样条插值算法：可产生二阶光滑度，即二阶导数连续签名图样
(Numerical analysis of curriculum design, enclosing the MATLAB source code and the word, using cubic spline interpolation design in English and Chinese signatures, double the three to do to improve using an interactive interface to operate with a mouse click to obtain the name of the data points roughly cubic spline interpolation algorithm: can generate second-order smoothness, that is, a continuous second derivative sign pattern)