c = getmswtfea​t(double(y​),Fs/2,Fs/​8,Fs); Undefined function or variable

Hello! I am a beginner of using MATLAB. I make my thesis on signal processing to Heart Diseases Diagnosis Using Intelligent

Algorithm Based on PCG Signal Analysis . But when Feature Extraction...

c = getmswtfeat(double(y),Fs/2,Fs/8,Fs); undefine function % undefine function.

c2 = melcepst(y, 8000 , 16, 24, (0.03 * Fs));%undefine function 

cdwt = getmswtfeat(double(y),Fs/2,Fs/8,Fs); % Undefine function 
% feat = getmswtfeat(x,winsize,wininc,SF)
        cmfc = melcepst(y, Fs*6 , 16, 16, (0.03 * Fs));%

input pascal data file face problem to Feature Extraction . Do I need to Feature Extraction input pascal pcg database data set .wav file ? If so could you tell me please how to do Feature Extraction ?

clc
clear all
DBFolder=dir('G:\jamir\Atraining_murmur\');
DBSize=length(DBFolder);
Features=zeros(1,308);
k=1;
lables={};
for i=3:DBSize
    SFolder=dir(strcat('G:\jamir\Atraining_murmur\',DBFolder(i).name,'\*.wav'));
    addpath(strcat('G:\jamir\Atraining_murmur\',DBFolder(i).name));
    SFSize=length(SFolder);
    for j=1:SFSize
        filename = SFolder(j).name;                  % file name to be loaded
        [y, Fs] = audioread(filename, 'native');  % signal bieng loaded having data in variable y and frequency Fs
        c = getmswtfeat(double(y),Fs/2,Fs/8,Fs);
        [rr,cc]=size(c);
        for m=1:7:rr-mod(rr,7)
            Features(k,:)=reshape(c(m:m+6,:),[1 308]);
            lables{k}=DBFolder(i).name;
            k=k+1;
            
        end
    end
end
%converting to table
FeaturesX=array2table(Features);
lablesY=cell2table(lables');
TrainingData=[FeaturesX lablesY];

[Walter Roberson]

That function appears to be part of https://www.mathworks.com/matlabcentral/fileexchange/33146-feature-extraction-using-multisignal-wavelet-packet-decomposition