gif_plot_example.m

%% 计算
clc;
clear;
% xa = -30:0.1:30;
% ya = 400:0.1:600;
% 不同区间范围图像显示不同
% xa = -5:0.1:5;
% ya = -20:0.1:20;

% xa = -5:0.01:5;
% ya = -50:0.1:80;

xa = -2:0.01:2;
ya = -5:0.1:8;

[x,y] = meshgrid(xa,ya);
z =100.*x.^4-250.*x.^2.*y+x.^2-2.*x+80.*y.^2+1;
%% 作图
mesh(x,y,z);
xlabel('X轴');  
ylabel('Y轴');  
zlabel('Z轴');  
title('函数三维图像');  
grid on %打开网格  
view(-100,30); % 不同角度看
% view(-30,30); 
% view(-90,90); %俯视图
%% 动图制作
pic_num = 1;
filename = strcat('.\img\gif_plot_example',datestr(now,30),'.gif'); % .\img 表示保存在Matlab当前打开的目录下的img文件夹下
% for i=-30:3:330
for i=-120:2:240
    %view(a,b):a是角度，b是仰视角  
    view(i,30);  
%     pause(0.1); 
    F=getframe(gcf);
    I=frame2im(F);
    [I,map]=rgb2ind(I,256);
    if pic_num == 1
        imwrite(I,map,filename,'gif', 'Loopcount',inf,'DelayTime',0.2);
    else
        imwrite(I,map,filename,'gif','WriteMode','append','DelayTime',0.2);
    end
    pic_num = pic_num + 1;
end