最小二乘法消除多项式趋势项的MATLAB编程-the least two multiplication

振动信号的预处理消除趋势项（最小二乘法消除多项式.）-Pretreatment to eliminate vibration signal Trend (least squares method to eliminate polynomial.)

MATLAB实现振动信号预处理：最小二乘法消除多项式趋势项和五点滑动平均法平滑处理-MATLAB realize vibration signal preprocessing: least squares polynomial trend items and eliminate a five-point moving average smoothing