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DWT about one dimensional wavelet transform function in matlab, the one dimensional vector with Hal

Time:10-11

A=[8, 4]

[c1 and c2]=DWT (a, 'haar)

According to the value of the wavelet transform (c1 Hal should be 6, c2 values should be 2, but the program run result is c1=c2=2.8284 8.4853, a great god know why want to ask next?
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