How do I check if the specific line in a text file is empty or not?

I have two text file. I want to read either one of them, First file has numbers from line 5 and the second from 7. I have to determine which file to read based on the starting of numbers. Thanks in advance cheers!!

Answer 1

[Harish Ramachandran]

A trivial implementation would be to open the file, check if the numbers exist till the 6th line and display which file is being read.

file = fopen('sample.txt');
line = fgetl(file);
for i=1:6
     if any(line >= '0' & line <= '9')
        disp("The fifth line contains numbers => first file")
     else
        disp("The fifth line does not contain numbers => second file")
    line = fgetl(file);
end
fclose(file);

[Avi]

Thanks for your help. It works. cheers..!!