how do I concatenate mat files matlab

I have hundreds of MAT files and i want to concatenate all these files to a single file,each MAT file has dimension of 69x128,here is the technique that I follwed before for fewer files but this is not comfortable for me please provide some comformtable and simpler way to dothe same job

a1=load(sprintf('datafile_%02d',1));
a2=load(sprintf('datafile_%02d',2));

P1 = a.dataselection(:,5:132);
P2 = a2.dataselection(:,5:132);
PO = [P1;P2];
save('PO')
load('PO')

Answer 1

[Voss]

N = 200; % number of files (assumed to be named datafile_01.mat, _02.mat, ..., _10.mat, ..., _99.mat, _100.mat, ..., as you have specified with '%02d')
C = cell(1,N);
for ii = 1:N
    A = load(sprintf('datafile_%02d.mat',ii));
    C{ii} = A.dataselection(:,5:132);
end
PO = vertcat(C{:});
save('PO.mat','PO')

[Stephen23]

Note that n_files should be N.

[Voss]

Thank you for that. Fixed.

[Stephen23]

Accepted, as it seems to answer the question.

[Voss]

I appreciate it!