Adding subplots to animated gif file

Question

mashtine 2014-10-16

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https://ww2.mathworks.cn/matlabcentral/answers/158897-adding-subplots-to-animated-gif-file

评论： derbruin 2015-7-8

Hi all,

I have the following code to create a gif from my data plots and I would like to do this with subplots for other parameters. The code is a bit messy but I am not sure how to work the handles for the subplots to have the playback synchronized for each plot:

DATASET1 = tower_pres_allyrs(1:100,1);
DATASET2 = tower_pres_allyrs(1:100,2);
h = plot(NaN,NaN); 
axis([min(DATASET1) max(DATASET1) min(DATASET2) max(DATASET2)]); 
for ii = 1:length(DATASET1)
    pause(0.1)
    set(h, 'XData', DATASET1(1:ii), 'YData', DATASET2(1:ii));
    drawnow 
    frame = getframe(1);
    im = frame2im(frame);
    [imind,cm] = rgb2ind(im,256);
    if ii == 1;
      imwrite(imind,cm,'filename.gif','gif','Loopcount',inf,'DelayTime',0.01);
    else
      imwrite(imind,cm,'filename.gif','gif','WriteMode','append','DelayTime',0.01);
    end
end

Thanks!

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Answer 1

Geoff Hayes 2014-10-17

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/158897-adding-subplots-to-animated-gif-file#answer_155467

编辑：Geoff Hayes 2014-10-22

在 MATLAB Online 中打开

Masao - what do you mean by I would like to do this with subplots for other parameters? As your above code doesn't reference subplots, how are you currently using subplots?

If hSubPlotAxes is the handle to the axes of any subplot, then your above code could become

 h = plot(hSubPlotAxes,NaN,NaN); 
 axis(hSubPlotAxes,[min(DATASET1) max(DATASET1) min(DATASET2) max(DATASET2)]); 
 for ii = 1:length(DATASET1)
    pause(0.1)
    set(h, 'XData', DATASET1(1:ii), 'YData', DATASET2(1:ii));
    drawnow 
    frame = getframe(hSubPlotAxes);
    im = frame2im(frame);
    [imind,cm] = rgb2ind(im,256);
    if ii == 1;
      imwrite(imind,cm,'filename.gif','gif','Loopcount',inf,'DelayTime',0.01);
    else
      imwrite(imind,cm,'filename.gif','gif','WriteMode','append','DelayTime',0.01);
    end
end

So we just use the handle to the subplot axes for whenever we wish to plot, set the axis limits, or getframe. You could the above code in a function and just pass the data, handle, and filename, so as to re-use the same code for each subplot.

EDIT

The line to call getframe has been updated to remove the second parameter.

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mashtine 2014-10-22

在 MATLAB Online 中打开

Hi Geoff,

Thanks again for your time. By 'I would like a gif that has 4 subplots on it that synchronously plots the data' I do mean what you said. I want all of the subplots to update at the same time and then simultaneously plot the next data point after saving the first into a gif.

I adjusted the code like you said but I keep getting and error with the getframe.

DATASET1 = tower_pres_allyrs(1:100,1);
DATASET2 = tower_pres_allyrs(1:100,2);
DATASET3 = tower_temp_allyrs(1:100,1);
DATASET4 = tower_temp_allyrs(1:100,2);
hSubPlotAxes = subplot(2,1,1);
h = plot(hSubPlotAxes,NaN,NaN); 
axis(hSubPlotAxes,[min(DATASET1) max(DATASET1) min(DATASET2) max(DATASET2)]); 
   for ii = 1:length(DATASET1)
      pause(0.1)
      set(h, 'XData', DATASET1(1:ii), 'YData', DATASET2(1:ii));
      drawnow 
      frame = getframe(hSubPlotAxes,1);
      im = frame2im(frame);
      [imind,cm] = rgb2ind(im,256);
      if ii == 1;
        imwrite(imind,cm,'filename.gif','gif','Loopcount',inf,'DelayTime',0.01);
      else
        imwrite(imind,cm,'filename.gif','gif','WriteMode','append','DelayTime',0.01);
      end
   end
hSubPlotAxes = subplot(2,1,2);
h = plot(hSubPlotAxes,NaN,NaN); 
axis(hSubPlotAxes,[min(DATASET3) max(DATASET3) min(DATASET4) max(DATASET4)]); 
   for ii = 1:length(DATASET3)
      pause(0.1)
      set(h, 'XData', DATASET3(1:ii), 'YData', DATASET4(1:ii));
      drawnow 
      frame = getframe(hSubPlotAxes,1);
      im = frame2im(frame);
      [imind,cm] = rgb2ind(im,256);
      if ii == 1;
        imwrite(imind,cm,'filename.gif','gif','Loopcount',inf,'DelayTime',0.01);
      else
        imwrite(imind,cm,'filename.gif','gif','WriteMode','append','DelayTime',0.01);
      end
  end

I am clearly missing something and I am sure the fault is on my end or in my explanation of the problem.

mashtine 2014-10-23

在 MATLAB Online 中打开

Thats the part that confused me, so if I have the first subplot with just one y data, I will use this:

hSubPlotAxes(1) = subplot(6,1,1);
hPlots{1} = plot(hSubPlotAxes(1),NaN,NaN);

but I am not too sure of how to then incorporate this with the axis handles and set within the loop. So far I have this (without taking into account what you just mentioned) and I am not too sure how to incorporate your the cell arrays. I only started plotting on the first two subplots:

    hSubPlotAxes    = [];
    hSubPlotAxes(1) = subplot(6,1,1);
    hSubPlotAxes(2) = subplot(6,1,2);
    hSubPlotAxes(3) = subplot(6,1,3);
    hSubPlotAxes(4) = subplot(6,1,4);
    hSubPlotAxes(5) = subplot(6,1,5);
    hSubPlotAxes(6) = subplot(6,1,6);
    hPlots    = [];
    hPlots(1) =  plot(hSubPlotAxes(1),NaN,NaN);
    hPlots(2) =  plot(hSubPlotAxes(2),NaN,NaN);
    hPlots(3) =  plot(hSubPlotAxes(3),NaN,NaN);
    hPlots(4) =  plot(hSubPlotAxes(4),NaN,NaN);
    hPlots(5) =  plot(hSubPlotAxes(5),NaN,NaN);
    hPlots(6) =  plot(hSubPlotAxes(6),NaN,NaN);
    axis(hSubPlotAxes(1),[min(PRESSTIME) max(PRESSTIME) 0 370]); % WINDDIR
    axis(hSubPlotAxes(2),[min(PRESSTIME) max(PRESSTIME) -0.5 0.5]); % LR
    axis(hSubPlotAxes(3),[min(PRESSTIME) max(PRESSTIME) 900 1050]);
    axis(hSubPlotAxes(4),[min(PRESSTIME) max(PRESSTIME) 270 300]);
    axis(hSubPlotAxes(5),[min(PRESSTIME) max(PRESSTIME) 0 25]);
    axis(hSubPlotAxes(6),[min(PRESSTIME) max(PRESSTIME) 0 30]);
     for ii = 1:length(PRESSTIME)
        pause(0.01)
        set(hPlots(1), 'XData', PRESSTIME(1:ii), 'YData', WINDDIR(1:ii,3), 'Color', 'r');
        % LR
        set(hPlots(2), 'XData', PRESSTIME(1:ii), 'YData', LR(1:ii,2), 'Color', 'k');
        hold all
        set(hPlots(2), 'XData', PRESSTIME(1:ii), 'YData', LR(1:ii,3), 'Color', 'k');
        set(hPlots(2), 'XData', PRESSTIME(1:ii), 'YData', LR(1:ii,4), 'Color', 'k');
        set(hPlots(2), 'XData', PRESSTIME(1:ii), 'YData', LR(1:ii,5), 'Color', 'r');
        set(hPlots(2), 'XData', PRESSTIME(1:ii), 'YData', LR(1:ii,6), 'Color', 'r');
        set(hPlots(2), 'XData', PRESSTIME(1:ii), 'YData', LR(1:ii,7), 'Color', 'r');
        drawnow 
        frame = getframe(gcf);
        im = frame2im(frame);
        [imind,cm] = rgb2ind(im,256);
        if ii == 1;
          imwrite(imind,cm,'Cold_front.gif','gif','Loopcount',inf,'DelayTime',0.001);
        else
          imwrite(imind,cm,'Cold_front.gif','gif','WriteMode','append','DelayTime',0.001);
        end
     end

mashtine 2014-10-23

编辑：mashtine 2014-10-23

在 MATLAB Online 中打开

handles.mat

Sorry, I thought I mentioned what was going wrong before but yes, the code is overwriting the ydata and only displaying the last plot:

set(hPlots(2), 'XData', PRESSTIME(1:ii), 'YData', LR(1:ii,7), 'Color', 'r');

However when I try plotting now with the cell array handles I am getting the following error:

Error using handle.handle/set
Invalid or deleted object.

I cannot find anything online that helps explain what is going on. The script works perfectly up to when the first set() is called but when I try to do plots on the second subplot, neither subplot (first nor second) plots on the figure and I get the above error. Here is the updated code:

hSubPlotAxes    = [];
hSubPlotAxes(1) = subplot(6,1,1);
hSubPlotAxes(2) = subplot(6,1,2);
hSubPlotAxes(3) = subplot(6,1,3);
hSubPlotAxes(4) = subplot(6,1,4);
hSubPlotAxes(5) = subplot(6,1,5);
hSubPlotAxes(6) = subplot(6,1,6);
hPlots    = {};
hPlots{1} =  plot(hSubPlotAxes(1),NaN,NaN);
hPlots{2} =  plot(gca,NaN,NaN(6,1));
hPlots{3} =  plot(hSubPlotAxes(3),NaN,NaN);
hPlots{4} =  plot(hSubPlotAxes(4),NaN,NaN);
hPlots{5} =  plot(hSubPlotAxes(5),NaN,NaN);
hPlots{6} =  plot(hSubPlotAxes(6),NaN,NaN);
axis(hSubPlotAxes(1),[min(PRESSTIME) max(PRESSTIME) 0 370]); % WINDDIR
axis(hSubPlotAxes(2),[min(PRESSTIME) max(PRESSTIME) -0.5 0.5]); % LR
axis(hSubPlotAxes(3),[min(PRESSTIME) max(PRESSTIME) 900 1050]);
axis(hSubPlotAxes(4),[min(PRESSTIME) max(PRESSTIME) 270 300]);
axis(hSubPlotAxes(5),[min(PRESSTIME) max(PRESSTIME) 0 25]);
axis(hSubPlotAxes(6),[min(PRESSTIME) max(PRESSTIME) 0 30]);
   for ii = 1:length(PRESSTIME)
      pause(0.01)
      set(hPlots{1,1}(1,1), 'XData', PRESSTIME(1:ii), 'YData', WINDDIR(1:ii,3), 'Color', 'r');
      set(hPlots{1,2}(1,1), 'XData', PRESSTIME(1:ii), 'YData', LR(1:ii,2), 'Color', 'k');
      hold all
      set(hPlots{1,2}(2,1), 'XData', PRESSTIME(1:ii), 'YData', LR(1:ii,3), 'Color', 'k');
      set(hPlots{1,2}(3,1), 'XData', PRESSTIME(1:ii), 'YData', LR(1:ii,4), 'Color', 'k');
      set(hPlots{1,2}(4,1), 'XData', PRESSTIME(1:ii), 'YData', LR(1:ii,5), 'Color', 'r');
      set(hPlots{1,2}(5,1), 'XData', PRESSTIME(1:ii), 'YData', LR(1:ii,6), 'Color', 'r');
      set(hPlots{1,2}(6,1), 'XData', PRESSTIME(1:ii), 'YData', LR(1:ii,7), 'Color', 'r');
      drawnow 
      frame = getframe(gcf);
      im = frame2im(frame);
      [imind,cm] = rgb2ind(im,256);
      if ii == 1;
        imwrite(imind,cm,'Cold_front.gif','gif','Loopcount',inf,'DelayTime',0.001);
      else
        imwrite(imind,cm,'Cold_front.gif','gif','WriteMode','append','DelayTime',0.001);
      end
   end

I only tried to plot on the first two subplots to reduce clutter. Geoff I am really sorry for all my painstaking questions! I hope this is the last!Attached is my hPlots array

Geoff Hayes 2015-7-8

Derbruin - where is the code to update the curve or even plot the image? Does the curve appear on the same axes as the image or on a different one? Please provide more information. As well, you may just want to post this as a separate question since it is distinct from Masao's question.

derbruin 2015-7-8

hi Geoff,

thanks for looking into this for me. I posted my question using this title "create .gif animation with mixed subplots of grayscale and color figures". Appreciate your help!

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Adding subplots to animated gif file

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