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Writing a frame to a video error

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Hi,
I wrote the following code for repeatedly reading excel file and scatter plotting then writing a video from it.
clear all;clc;
filename1='x_recall_safeaudio_shockvideo.csv';
filename2='y_recall_safeaudio_shockvideo.csv';
col='B':'F';
repeats=5;
for i=1:repeats
clear X; clear Y;
X=xlsread(filename1,regexprep(filename1,'.csv',''),strcat(col(i),':',col(i)));
Y=xlsread(filename2,regexprep(filename2,'.csv',''),strcat(col(i),':',col(i)));
figure(i);
plot1=scatter(X(1),Y(1),100,'b','filled');
grid on
xlim([-350 350]);
ylim([-350 350]);
xlabel('[px]')
ylabel('[px]')
title('Animal movement during conditioning');
for j=2:length(X)
plot1.XData=X(j);
plot1.YData=Y(j);
drawnow
F(j)=getframe(gcf);
end
writerObj=VideoWriter(strcat('Conditioning',num2str(i),'.mp4'),'MPEG-4');
writerObj.FrameRate=30;
open(writerObj);
writeVideo(writerObj,F(j));
close(writerObj);
close all
end
However the generated video doesn`t have any frame in it.
Please give me your recommendations.
Thank you.

Accepted Answer

JESUS DAVID ARIZA ROYETH
JESUS DAVID ARIZA ROYETH on 29 Jul 2020
you need to rearrange some things:
clear all;clc;
filename1='x_recall_safeaudio_shockvideo.csv';
filename2='y_recall_safeaudio_shockvideo.csv';
col='B':'F';
repeats=5;
for i=1:repeats
clear X; clear Y;
X=xlsread(filename1,regexprep(filename1,'.csv',''),strcat(col(i),':',col(i)));
Y=xlsread(filename2,regexprep(filename2,'.csv',''),strcat(col(i),':',col(i)));
figure(i);
plot1=scatter(X(1),Y(1),100,'b','filled');
grid on
xlim([-350 350]);
ylim([-350 350]);
xlabel('[px]')
ylabel('[px]')
title('Animal movement during conditioning');
writerObj=VideoWriter(strcat('Conditioning',num2str(i),'.mp4'),'MPEG-4');
writerObj.FrameRate=30;
open(writerObj);
for j=2:length(X)
plot1.XData=X(j);
plot1.YData=Y(j);
drawnow
F(j)=getframe(gcf);
writeVideo(writerObj,F(j));
end
close(writerObj);
close all
end

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