将结果视图角度调整为xo面：x = linspace(-5,5,100);z = linspace(-5,5,100);[X,Z] = meshgrid(x,z);k = 2*pi/lambda;w = 2*pi*f;E_0 = 1;theta = pi/2;figure();axis([-5,5,-5,5,-5,5]);for i = 1:length(t) E_z = -2*E_0*sin(k*cos(theta)*Z).*sin(w*t(i)-k*sin(theta)*X); surf(X,E_z,Z); xlabel('x(m)'); ylabel('y(m)'); zlabel('z(m)'); title(sprintf('时间:%.2fs',t(i))); drawnow;end

将结果视图角度调整为 $x$-$z$ 平面，只需要将视角旋转即可。修改后的代码如下：

x = linspace(-5,5,100);
z = linspace(-5,5,100);
[X,Z] = meshgrid(x,z);
k = 2*pi/lambda;
w = 2*pi*f;
E_0 = 1;
theta = pi/2;
figure();
axis([-5,5,-5,5,-5,5]);
for i = 1:length(t)
    E_z = -2*E_0*sin(k*cos(theta)*Z).*sin(w*t(i)-k*sin(theta)*X);
    surf(X,E_z,Z);
    xlabel('x(m)');
    ylabel('y(m)');
    zlabel('z(m)');
    title(sprintf('时间:%.2fs',t(i)));
    view(0,90);  % 将视角旋转为 x-z 平面
    drawnow;
end

其中，view(0,90) 表示将视角旋转为 x-z 平面，即俯视视角。