关于小波系数重构的问题比如,一一维信号sig经过俩层分解,如图所示.程序为:[c,l]=wavedec(sig,4,'db2');a1=wrcoef('a',c,l,'db4',1);a2=wrcoef('a',c,l,'db4',2);figure(2)subplot(221);plot(
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![关于小波系数重构的问题比如,一一维信号sig经过俩层分解,如图所示.程序为:[c,l]=wavedec(sig,4,'db2');a1=wrcoef('a',c,l,'db4',1);a2=wrcoef('a',c,l,'db4',2);figure(2)subplot(221);plot(](/uploads/image/z/11487999-39-9.jpg?t=%E5%85%B3%E4%BA%8E%E5%B0%8F%E6%B3%A2%E7%B3%BB%E6%95%B0%E9%87%8D%E6%9E%84%E7%9A%84%E9%97%AE%E9%A2%98%E6%AF%94%E5%A6%82%2C%E4%B8%80%E4%B8%80%E7%BB%B4%E4%BF%A1%E5%8F%B7sig%E7%BB%8F%E8%BF%87%E4%BF%A9%E5%B1%82%E5%88%86%E8%A7%A3%2C%E5%A6%82%E5%9B%BE%E6%89%80%E7%A4%BA.%E7%A8%8B%E5%BA%8F%E4%B8%BA%EF%BC%9A%5Bc%2Cl%5D%3Dwavedec%28sig%2C4%2C%26%2339%3Bdb2%26%2339%3B%29%3Ba1%3Dwrcoef%28%26%2339%3Ba%26%2339%3B%2Cc%2Cl%2C%26%2339%3Bdb4%26%2339%3B%2C1%29%3Ba2%3Dwrcoef%28%26%2339%3Ba%26%2339%3B%2Cc%2Cl%2C%26%2339%3Bdb4%26%2339%3B%2C2%29%3Bfigure%282%29subplot%28221%29%3Bplot%28)
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