exporting data using xlswrite for each 24 hours?

dear all, by using xlswrite('DATA', DATA, 'output_data', sprintf('A%d')); i can export my DATA to excel sheet. Since,its is a part of real-time video analysing, i'd like to save data for each 24 hours, i mean after 24-hours it can automatically export to another excel file and so on.. can you help me please

[Geoff Hayes]

Abo - does your software already know when you have reached the 24 hours and so should write the data to file? Are you using a timer for this?

[Abo]

no, just using matlab. i think need to use my PC local time as time.

[Geoff Hayes]

Right, but have you written your MATLAB code to use a timer that expires in 24 hours? Please provide more details including a brief description of what code you have written and what you need help with.

[Abo]

thank you, mu code is kind of real time video processing, it gets snapshot for a period of time, as shown here, i'd like to save data as excel for each 24 hours, i hope to make sense.

vid=videoinput('winvideo',1);

set (vid,'ReturnedColorspace','grayscale');

vid.FrameGrabInterval=1;

framesneeded=20;

start (vid)

% time1=datestr(now,'dd-mm-yyyy HH:MM:SS FFF');

while vid.FramesAcquired<=framesneeded

     time1=datestr(now,'HHMMSS')

     data=getsnapshot(vid);

     level=graythresh (data);

     bw=im2bw(data,.08);
     ...
     ..
     DATA=[extracting some data];

      xlswrite('DATA',DATA,time1);