how to use this script with multiple data

hi hi I'm just learning matlab. I have a script to process the satellite data are only for 1 hour. I had to do the data every hour for 2 months. please help me to edit this script. The formula by subtracting the data at the same hour.

nx=141;ny=81;
dlon=0.05;dlat=0.05;
lat=-8:dlat:-4;
lon=103:dlon:110;

%load data tbb
fid1=fopen('IR1_10101501.dat','r');
fid2=fopen('IR2_10101501.dat','r');
tbb1=fread(fid1,[nx,ny],'float32');
tbb2=fread(fid2,[nx,ny],'float32');
tbb12=tbb1-tbb2;

for j=1:ny-1
    for i=1:nx-1 
           tbb12=tbb1-tbb2;  
    end
end 
fclose(fid1);
fclose(fid2);

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

[Jan]

To make a helpful answer much easier, delete all lines, which do not concern the problem in the posted code. Currently it is hard to see, what you want to modify.

[Walter Roberson]

Note: your lines

tbb12=tbb1-tbb2;

for j=1:ny-1

for i=1:nx-1

tbb12=tbb1-tbb2;

end

end

have the nested for loops repeating over and over again the tbb12=tbb1-tbb2 that was already done outside the loop. At this time those nested for loops appear to be redundant.