close all; graphics_toolkit qt; x = 0:0.1:20; y1 = sin(x); y2 = cos(x); plot(x , y1, 'r+', 'markersize', 10, x, y2, 'y', 'linewidth', 4);legend('y1','y2'); figure; plot(x, y2, 'y', 'linewidth', 4, x , y1, 'r+', 'markersize', 10);legend('y2','y1');