Question: what is wfilters in matlab?
Answer: [ LoD , HiD , LoR , HiR ] = wfilters( wname ) returns the four lowpass and highpass, decomposition and reconstruction filters associated with the orthogonal or biorthogonal wavelet wname . ... For example, wfilters('db6','h') returns the pair of highpass filters HiD and HiR associated with the db6 wavelet.