Using audioread to read a sequence of files and then combine

I am am trying to read all wav files within a folder and then combine those files. I understannd audioread and audiowrite. I am stuggling to automate the processing of a sequence of files within a folder so that I only have to change the dirin name and can move to the next folder. The code here obviously doesn't work but trying to demonstrate what I want to do.

DirIn = 'C:\Users\24hr sound analysis\17';

eval(['filelist=dir(''' DirIn '/*.wav'')'])

for i = 1:length(filelist);
[f(i),fs] = audioread(strcat(DirIn,'/',filelist(i).name)); % read in wav file
end

combined = [f1;f(i)]; 

audiowrite('combined.wav',combined, fs)

Answer 1

[Stephen23]

Do NOT use EVAL for trivial code like this.

Use FULLFILE instead of concatenating text together.

P = 'C:\Users\24hr sound analysis\17';
S = dir(fullfile(P,'*.wav'));
for k = 1:numel(S)
    F = fullfile(P,S(k).name);
    [S(k).data,fs] = audioread(F);
end
M = vertcat(S.data); % comma-separated list
audiowrite('combined.wav', M, fs)

https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html

https://www.mathworks.com/matlabcentral/answers/320713-how-to-operate-on-comma-separated-lists

[Ninad Kuware]

Thank you very much Stephen