1、代码：

%% ------------------------------------------------------------------------%%            Output Info about this m-filefprintf('\n***********************************************************\n');fprintf('        
     
       Problem 2.17 \n\n');banner();%% ------------------------------------------------------------------------nx1 = [0:4]; x1 = [1, 2, 3, 4, 5];  nh1 = [0:3]; h1 = [6, 7, 8, 9];[y1, ny1] = conv_m(x1, nx1, h1, nh1);ny1y1figure('NumberTitle', 'off', 'Name', 'Problem 2.17')set(gcf,'Color',[1,1,1])                  % 改变坐标外围背景颜色subplot(3,1,1); stem(nx1, x1); title('x1 sequence');xlabel('n'); ylabel('x(n)') ;grid onsubplot(3,1,2); stem(nh1, h1); title('h1 sequence');xlabel('n'); ylabel('h1(n)');grid on;subplot(3,1,3); stem(ny1, y1); title('y1=x1*h1 sequence');xlabel('n'); ylabel('y1(n)');grid on;
     

　　运行结果：