绘制直方图 x = randn(1000,1; subplot(1,2,1;hist(x; subplot(1,2,2;hist(x,8; 250 300 200 250 200 150 150 100 100 50 50 0 -4 -2 0 2 4 0 -4 -2 0 2 4 6. 离散数据图形：stem(x,y / stairs(x,y / stem3(x,y,z 二维离散图形、二维阶跃图形、三维离散图形 x = [0:10:360]*pi/180; y = sin(x; subplot(2,2,1;plot(x,y; subplot(2,2,2;stem(x,y; subplot(2,2,3;stairs(x,y; t = 0:0.1:10; s = 0.1+i; y = exp(-s*t; subplot(2,2,4;stem3(real(y,imag(y,t;
1 0.5 0 -0.5 -1 1 0.5 0 -0.5 -1 0 2 4 6 8 0 2 4 6 8 1 0.5 0 -0.5 -1 10 5 0 1 0 0 2 4 6 8 -1 -1 0 1 7. 等值线图：contour(x,y,z,n 绘制二维等值线 n = [-2:0.2:2]; [X,Y,Z] = peaks(n; contour(X,Y,Z,10; 2 1.5 1 0.5 0 -0.5 -1 -1.5 -2 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 8.等值线图（符号函数）： ezcontour(f, domain,n / ezcontourf(f,domain,n 绘制符号函数的等值线。
绘制函数
-x^2*exp(-(x^2-(y+1^2... -10*(x/5-x^3-y^5*exp(-x^2-y^2... -1/3*exp(-(x+1^2-y^2; subplot(1,2,1;ezcontour(f,[-3,3],49;title('contour'; subplot(1,2,2;ezcontourf(f,[-3,3],49; title('filled contour'; contour 3 3 filled contour 2 2 1 1 0 0 y -1 y -2 0 x 2 -1 -2 -2 -3 -3 -2 0 x 2 9. 矢量图：
quiver(x,y,u,v 绘制矢量像(x,y是坐标，(u,v是待绘制的矢量 n = [-2:0.2:2]; [X,Y,Z] = peaks(n; contour(X,Y,Z,10; [U, V] = gradient(Z, 0.2; hold on quiver(X,Y,U,V;
contour 3 2 1.5 2 1 1 0.5 0 0 -0.5 -1 -1 -2 -1.5 -3 -2 -2 y -2 0 x 2 -1 0 1 2
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