function [X]=tent(size, magnitude)
    X=zeros( size, 1 );
    half = floor( size/2 );
    dy = 1 / half;
    
%     for j = 1:size
%         X( j, 1 ) = dy*(j-1);
%     end    
    for j = 1:half
        X( j, 1 ) = dy*(j-1);
    end    
    for j = size:-1:half+1
        X( j, 1 ) = dy*(abs(j-size));
    end    
end