time and date for measurement selection

Thnk you for the last answer. I have another?:

I have 708 .txt files. and from this file i want to select just measurement values related to specified date and time. i wrote this code:

%code

for i=113:708

fileID = fopen(['ExtractedPrintout_' num2str(i) '.txt']);

data{i,1} = textscan(fileID, '%s %s %s %d %d %d %d %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f '); fclose(fileID);

 time{i,1}=data{i,1}{2}; 
 datee{i,1}= data{i,1}{1};

 r{i,1}=data{i,1}{23};  

 s{i,1}=data{i,1}{15};

 p{i,1}=data{i,1}{9};
 a{i,1}=data{i,1}{8};

end %

My Problem :

I dont kno how to use the date and time to select the measuremnt.

Thank you