% PURPOSE: demonstrate some of the utility functions%%% usage: util_dclear all;% demonstrate vecx = 1:20;mat = [x(1,1:10)' x(1,11:20)'];v = vec(mat);disp('matrix =');matdisp('stacked vector =');v% demonstrate p_latexnumbers = rand(10,4);disp('LaTeX formatted table from matrix');lprint(numbers);% now use a different formatdisp('different user-supplied format for table from matrix');in.fmt = strvcat('%12.4f');lprint(numbers,in);% demonstrate accumulateacc = accumulate(mat);disp('matrix columns accumulated');acc% demonstrate seasonal dummy variablesseas = sdummy(36,12);disp('seasonal dummy variables');seas