对MIT心电信号处理，线性插值，低通滤波，高通滤波，带阻滤波。 使用方法为在命令窗口输入R('XX.txt'),XX为你在MIT下载的txt数据。(MIT ECG signal processing, linear interpolation, low pass filter, high pass filter, band stop filter. The use of the method is to enter R ('XX.txt') at the command window, an