%try this
for k=1:24
data=xlsread('exemple.xlsx') %data is an array that contains your data
n=size(data,1) % n: number of rows
plot(data) % plot data in one figure(it's up to you how you want to plot
filename=strcat('file',num2str(k)) %create files: file1 file2 file3...
save(filename,'data') %save data in file 1, after 1hour it saves on file2...
pause(3600) % wait one hour, then repeat .
end