心电图的傅里叶变换，反傅里叶变换滤波等等。阈值算法求波位置。-ECG Fourier Transform, the anti-Fourier transform filtering and so on. Threshold algorithm for wave position.

以上是二维傅里叶变换程序源代码 还有傅里叶反变换-These are the two-dimensional Fourier Transform source code for inverse Fourier transform

对信号进行傅里叶变换，并绘出频谱图，功率谱，对数谱等。然后对信号进行反傅里叶变换恢复出原始信号，并绘出其各种谱图-The Fourier transform of the signal, and plot the frequency spectrum, power spectrum, the number spectrum. And inverse Fourier transform to recover the original signal and plot its various spec