中文说明：实现了用最小二乘法对信号消除趋势项，用matlab调用Excel中数据，并附实测数据。
English Description：
The least square method is used to eliminate the trend term of the signal. The data in excel is called by MATLAB, and the measured data is attached.
Using least square method to eliminate trend term of signal
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中文说明：实现了用最小二乘法对信号消除趋势项，用matlab调用Excel中数据，并附实测数据。
English Description：
The least square method is used to eliminate the trend term of the signal. The data in excel is called by MATLAB, and the measured data is attached.