matlab中小波滤波

微信公开课小程序热门讨论「matlab中小波滤波」最新回复-%以下为滤波程序（主要调节参数c的大小）c=10;wn=0.1;fs=50000;%采样频率；b=fir1(c,wn/(fs/2),hamming(c+1));y1=filtfilt(b,1,y);%对y滤波
Matlab之小波滤波函数:　　1wfilters函数　　[Lo_D,Hi_D,Lo_R,Hi_R]=wfilters(wname)computesfourfiltersassociatedwiththeorthogonalorbiorthogonalwaveletnamedinthestringwname.Thefouroutputfiltersare　　Lo_D,thedecompositionlow-passfilter Hi_D,thedecompositionhigh-passfilter Lo_R,thereconstructionlow-passfilter　　Hi_R,thereconstructionhigh-passfilter　　2biorfilt函数　　Thebiorfiltcommandreturnseitherfouroreightfiltersassociatedwithbiorthogonalwavelets.　　3orthfilt函数　　[Lo_D,Hi_D,Lo_R,Hi_R]=orthfilt(W)computesthefourfiltersassociatedwiththescalingfilterWcorrespondingtoawavelet　　4biorwaef函数　　[RF,DF]=biorwavf(W)returnstwoscalingfiltersassociatedwiththebiorthogonalwaveletspecifiedbythestringW.　　5coifwavf函数　　F=coifwavf(W)returnsthescalingfilterassociatedwiththeCoifletwaveletspecifiedbythestringWwhereW=coifN.PossiblevaluesforNare1,2,3,4,or5　　6dbaux函数　　W=dbaux(N,SUMW)istheorderNDaubechiesscalingfiltersuchthatsum(W)=SUMW.PossiblevaluesforNare1,2,3,...　　W=dbaux(N)isequivalenttoW=dbaux(N,1) W=dbaux(N,0)isequivalenttoW=dbaux(N,1)　　7dbwavf函数　　F=dbwavf(W)returnsthescalingfilterassociatedwithDaubechieswaveletspecifiedbythestringWwhereW=dbN.PossiblevaluesforNare1,2,3,...,45.　　　　8mexihat函数　　[PSI,X]=mexihat(LB,UB,N)returnsvaluesoftheMexicanhatwaveletonanNpointregulargrid,X,intheinterval[LB,UB].　　OutputargumentsarethewaveletfunctionPSIcomputedonthegridX. Thiswavelethas[-55]aseffectivesupport. 更多有关「matlab中小波滤波」的疑问请扫码关注微信公开课+小程序！了解更多