文件名称:dwt
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一维离散小波变换，输出项是一维离散小波变换的小波变换系数，输入值是小波名，信号序列-The dwt command performs a single-level one-dimensional wavelet decomposition with respect to either a particular wavelet ( wname , see wfilters for more information) or particular wavelet decomposition filters (Lo_D and Hi_D) that you specify.
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