following code is used for filter? if yes, what is the type of filter can u help me ? wavedec and appcoef use for filter?

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serhat dag 2016-12-25

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https://ww2.mathworks.cn/matlabcentral/answers/318157-following-code-is-used-for-filter-if-yes-what-is-the-type-of-filter-can-u-help-me-wavedec-and-a

编辑： serhat dag 2016-12-25

if flag==2
                      flag=3;
                      [c,l]=wavedec(nfile,8,'db8');
                      ca1=appcoef(c,l,'db8',1);
                      ca2=appcoef(c,l,'db8',2);
                      ca3=appcoef(c,l,'db8',3);
                      ca4=appcoef(c,l,'db8',4);
                         figure(2),plot(ca1,'-k'),title('Cofficients of Signal At l Level Decomposition')
                          figure(3),plot(ca2,'-k'),title('Cofficients of Signal At 2 Level Decomposition')
                           figure(4),plot(ca3,'-k'),title('Cofficients of Signal At 3 Level Decomposition')
                            figure(5),plot(ca4,'-r'),title('Cofficients of Signal At 4 Level Decomposition')
                            flag=3 ;
                  else
                      errordlg('First select ECG Signal')
                  end