Function to reduce the noise in data stored in columns of a matrix

SUBMITTED BY: davalillocm

DATE: May 12, 2022, 4:20 p.m.

UPDATED: May 13, 2022, 12:46 a.m.

FORMAT: Text only

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function [V]=SMOOTHER(U,p)
%  Smooth by colum the matrix U, p times
%  
% 
[m,n]=size(U);
req=p*p+4;
V=zeros(m,n);
if m>req
    for q=1:p
        for j=1:n
            V(1,j)=U(1,j);
            V(2,j)=U(2,j);
            for i=3:(m-2)
                V(i,j)=(U(i-2,j)+U(i-1,j)+U(i,j)+U(i+1,j)+U(i+2,j))/5;
            end
            V(m-1,j)=U(m-1,j);
            V(m,j)=U(m,j);
        end
        U=V;
    end
else
    error('myApp:argChk', ['More than ', num2str(req),' points needed!']);
end

end