1.一元分段函数绘图 例如：把下面的函数保存为 Piecewise_x.m 文件function F=Piecewise_x(x) F=x.2.*(x=0 end 运行：x,y=meshgrid(-3:0.1:3); s=size(x) Pxy=zeros(s(1),s(2); for i=1:s(1)for j=1:s(2)Pxy(i,j)=Piecewise_xy(x(i,j),y(i,j);end end mesh(x,y,Pxy)