Generate animation(mp4) from for loop with plot

Question

Frederick Awuah-Gyasi 2022-5-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1725220-generate-animation-mp4-from-for-loop-with-plot

评论： Frederick Awuah-Gyasi 2022-5-23

This code produces/generates 6 plots A1, A2, B1, B2, C1, C3. I am trying to produce 3 animations one for A1&A2, another for B1, B2 and a 3rd one for C1 & C3. Currently I have the 3 animations but in each one I see all 6 plots. Any help? My if conditions doesn't seem to work. Thank you.

CA = {'A'    1    0        3 
    'A'    1    2        3 
    'A'    1    3        3 
    'A'    2    0        5
    'A'    2    2        7 
    'A'    2    3        8
    'B'    1    0        3 
    'B'    1    1        3 
    'B'    1    3        3 
    'B'    2    0       12
    'B'    2    2        1
    'B'    2    3        3
    'C'    1    0        2 
    'C'    1    1        1 
    'C'    1    2        3 
    'C'    2    0        4
    'C'    2    1        3
    'C'    2    2        6};
T1 = cell2table(CA,'VariableNames',{'X','W','Y','Z'});
[ix,ID] = findgroups(T1(:,1:2));
[U1,~,ixx] = unique(T1.X);
L = size(ID,1);
Names = unique(T1.X)
M = numel(U1);
for b = 1:length(Names)  
    for k = 1:L
        figure(k) %subplot(L,1,k)
        %
        v = find(ix == k);
        data=unique(T1.X(v))
        Names(b)
        ismember( Names(b), data )
        if ismember( Names(b), data )
            T1.X(v)
            plot(T1.Y(v), T1.Z(v), '.-')
            grid
            xlabel('Y')
            ylabel('Z')
            title(sprintf('%s %d',ID{k,1}{:},ID{k,2}))
            ylim([0 10])
            GF = getframe(gcf)                          % Test
            Vector(k) = getframe(gcf);
        end
        
    end
    moviename = strcat('Level_1_Movie_', Names(b))
    myWriter = VideoWriter(moviename{1},'MPEG-4');
    myWriter.FrameRate = 20;
    open(myWriter);
    writeVideo(myWriter,Vector);
    close(myWriter);
end

thanks to @Star Strider help on getting this far.

2 个评论
显示无隐藏无

Johan 2022-5-23

在 MATLAB Online 中打开

I think the error comes from your Vector(k) statement, you don't reset it between each loop. Maybe this modifications would fix it ?

for b = 1:length(Names)  
    index = 1; %iniate a variable for Vector indexing
    clear Vector %clear Vector to make sure you don't save leftover data in your movie
    
    for k = 1:L
        figure(k) %subplot(L,1,k)
        v = find(ix == k);
        data=unique(T1.X(v))
        Names(b)
        ismember( Names(b), data )
        if ismember( Names(b), data )
            T1.X(v)
            plot(T1.Y(v), T1.Z(v), '.-')
            grid
            xlabel('Y')
            ylabel('Z')
            title(sprintf('%s %d',ID{k,1}{:},ID{k,2}))
            ylim([0 10])
            GF = getframe(gcf)                          % Test
            Vector(k) = getframe(gcf);
        end
        
    end
    moviename = strcat('Level_1_Movie_', Names(b))
    myWriter = VideoWriter(moviename{1},'MPEG-4');
    myWriter.FrameRate = 20;
    open(myWriter);
    writeVideo(myWriter,Vector);
    close(myWriter);
end

Frederick Awuah-Gyasi 2022-5-23

Thanks @Johan Pelloux-Prayer. getting closer I guess. got one animation with only A1, A2 (which is good) with an error

Error using VideoWriter/writeVideo (line 414)

The 'cdata' field of FRAME must not be empty

Error in test (line 53)

writeVideo(myWriter,Vector);

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Frederick Awuah-Gyasi 2022-5-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1725220-generate-animation-mp4-from-for-loop-with-plot#answer_970050

Fixed. Create a sub table for each set in column X and use the same code. Worked. Thanks all.

CA = {'A' 1 0 3

'A' 1 2 3

'A' 1 3 3

'A' 2 0 5

'A' 2 2 7

'A' 2 3 8

'B' 1 0 3

'B' 1 1 3

'B' 1 3 3

'B' 2 0 12

'B' 2 2 1

'B' 2 3 3

'C' 1 0 2

'C' 1 1 1

'C' 1 2 3

'C' 2 0 4

'C' 2 1 3

'C' 2 2 6};

T1 = cell2table(CA,'VariableNames',{'X','W','Y','Z'});

%[ix,ID] = findgroups(T1(:,1:2));

%L = size(ID,1);

Names = unique(T1.X)

for b = 1:length(Names)

SetA = T1(contains(T1.X,Names(b)),:)

[ix,ID] = findgroups(SetA(:,1:2));

L = size(ID,1);

for k = 1:L

figure(k) %subplot(L,1,k)

v = find(ix == k);

plot(SetA.Y(v), SetA.Z(v), '.-')

grid

xlabel('Y')

ylabel('Z')

title(sprintf('%s %d',ID{k,1}{:},ID{k,2}))

ylim([0 10])

GF = getframe(gcf) % Test

Vector(k) = getframe(gcf);

end

moviename = strcat('Level_1_Movie_', Names(b))

myWriter = VideoWriter(moviename{1},'MPEG-4');

myWriter.FrameRate = 20;

open(myWriter);

writeVideo(myWriter,Vector);

close(myWriter);

clear Vector

end

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Frederick Awuah-Gyasi 2022-5-23

@Star Strider can you check it out. Didn't want to celebrate alone. pls run it and see what our destination was. You did most of the work. Thank you.

请先登录，再进行评论。

Generate animation(mp4) from for loop with plot

2 个评论
显示无隐藏无

采纳的回答

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

更多回答（0 个）

另请参阅

类别

标签

Community Treasure Hunt

Generate animation(mp4) from for loop with plot

2 个评论 显示 无隐藏 无

采纳的回答

1 个评论 显示 -1更早的评论隐藏 -1更早的评论

更多回答（0 个）

另请参阅

类别

标签

Community Treasure Hunt

WeChat

2 个评论
显示无隐藏无

1 个评论
显示 -1更早的评论隐藏 -1更早的评论