>> h_x = [1/3 1/3 1/3] h_x = 0.3333 0.3333 0.3333 >> h1 = conv(h_x, h_x) h1 = 0.1111 0.2222 0.3333 0.2222 0.1111 >> h2 = conv(h1, h_x) h2 = 0.0370 0.1111 0.2222 0.2593 0.2222 0.1111 0.0370 >> h3 = conv(h2, h_x) h3 = 0.0123 0.0494 0.1235 0.1975 0.2346 0.1975 0.1235 0.0494 0.0123 >> h4 = conv(h3, h_x) h4 = 0.0041 0.0206 0.0617 0.1235 0.1852 0.2099 0.1852 0.1235 0.0617 0.0206 0.0041 >> plot(h1) >> plot(h2) >> plot(h3) >> plot(h4) >> h5 = conv(h4, h_x) h5 = Columns 1 through 11 0.0014 0.0082 0.0288 0.0686 0.1235 0.1728 0.1934 0.1728 0.1235 0.0686 0.0288 Columns 12 through 13 0.0082 0.0014 >> h6 = conv(h5, h_x); >> h7 = conv(h6, h_x); >> h9 = conv(h8, h_x); ??? Undefined function or variable 'h8'. >> h8 = conv(h7, h_x); >> h9 = conv(h8, h_x); >> plot(h9)