曲线最小二乘拟合方法，用最小二乘法拟合取向数据。可用数据点反求控制点。-Least squares curve fitting method, using least square method-oriented data. Reverse data points available control points.

采用svg绘制曲线图，需要acrobe svg viewer客户才可查看-svg curve

数控插补自动点动，刚刚自学，还请指出错误-NC interpolation automatic jog, just self-study, please also indicate the error