A wavelet function can be viewed as a high pass filter, which aproximates a data set (a signal or time series). The result of the wavelet function is the difference between value calculated by the wavelet function and the actual data. The scaling fun

计算地震数据的频谱分布图，用于地震数据处理中的频率滤波和时频分析(calculate the spectral distribution of seismic data, and it can be used for frequency filtering and time-frequency analysis in seismic data processing)