Count specific characters per line using AWK
I just figured out to use the handy little UNIX utility AWK, which makes parsing text files a breeze, if you know how to speak its language. For the uninitated, there is a great list of little AWK one liners that you can check out here:
One thing I couldn’t seem to google was how to extract specific characters on a per-line, per column basis. After some mashing together and trial and error, I came up with a code that will count the number of 1’s and 0’s in a column seperated file (in this case, from column 3 and 4 respectively from the file). Give it a shot, and feel free to use as you see fit ;)
Extract Sequences from FASTA file.