MATLAB动图问题

Question

以下是一个输出动图的程序：figure;frames_images = cell(1, (41-1)/5 + 1);for i=1:5:41 pcolor(xmesh/20,ymesh/20,vor_phase_ave(:,:,i)*20/42); shading interp; axis equal tight; axis([0 5 -3 3]); hold on; fill([0,0.5,0.5,0],[-3,-3,-0.5,-0.5],'w') fill([0,0.5,0.5,0],[-0.5,-0.5,0.5,0.5],'k');hold on; fill([0,0.5,0.5,0],[0.5,0.5,3,3],'w'); set(gca,'FontName','Times New Roman','FontSize',12); text(-1,0,'\ity/\itD ','FontSize', 14, 'FontName', 'times new roman'); text(2.5,-3.4,'\itx/\itD ','FontSize', 14, 'FontName', 'times new roman'); set(gca,'LineWidth',1.5); colormap jet; caxis([-10 10]); drawnow; frames_images{(i-1)/5 + 1} = frame2im(getframe(gcf)); waitforbuttonpress; endfilename = 'vordongtu2.gif';for idx = 1:length(frames_images) [A, map] = rgb2ind(frames_images{idx}, 256); if idx == 1 imwrite(A, map, filename, 'gif', 'LoopCount', Inf, 'DelayTime', 1); else imwrite(A, map, filename, 'gif', 'WriteMode', 'append', 'DelayTime', 1); end end
现在我想要每一个动图上都有一个标题，标题的程序为 text(2,3.5,'{\it\Phi} = (i-1)*0.05\pi ','FontSize', 14, 'FontName', 'times new roman'); end目的是为了标题也能随动图的变化而变化，应该如何在原程序中添加，麻烦直接在原程序中添加。

Answer 1

qq_47361278 晚上好🌙🌙🌙
本答案参考ChatGPT-3.5

要在原程序中添加动态变化的标题，可以将text函数放在循环中，确保每一帧都会有一个对应的标题。以下是修改后的代码：

figure;
frames_images = cell(1, (41-1)/5 + 1);

for i=1:5:41
    pcolor(xmesh/20, ymesh/20, vor_phase_ave(:,:,i)*20/42);
    shading interp;
    axis equal tight;
    axis([0 5 -3 3]);
    hold on;
    fill([0,0.5,0.5,0],[-3,-3,-0.5,-0.5],'w')
    fill([0,0.5,0.5,0],[-0.5,-0.5,0.5,0.5],'k');
    hold on;
    fill([0,0.5,0.5,0],[0.5,0.5,3,3],'w');
    set(gca,'FontName','Times New Roman','FontSize',12);
    text(-1,0,'\ity/\itD ','FontSize', 14, 'FontName', 'times new roman');
    text(2.5,-3.4,'\itx/\itD ','FontSize', 14, 'FontName', 'times new roman');
    set(gca,'LineWidth',1.5);
    colormap jet;
    caxis([-10 10]);
    
    % 添加动态变化的标题
    title_str = sprintf('{\\it\\Phi} = %.2f\\pi', (i-1)*0.05);
    text(2, 3.5, title_str, 'FontSize', 14, 'FontName', 'times new roman');
    
    drawnow;
    frames_images{(i-1)/5 + 1} = frame2im(getframe(gcf));
    waitforbuttonpress;
end

filename = 'vordongtu2.gif';

for idx = 1:length(frames_images)
    [A, map] = rgb2ind(frames_images{idx}, 256);
    if idx == 1
        imwrite(A, map, filename, 'gif', 'LoopCount', Inf, 'DelayTime', 1);
    else
        imwrite(A, map, filename, 'gif', 'WriteMode', 'append', 'DelayTime', 1);
    end
end

解决方案：

1. 在循环中添加title_str变量，使用sprintf函数根据当前帧的索引i计算变化的标题。
2. 在 text 函数中使用 title_str 变量作为标题内容。
3. 保持原有代码不变即可。