Please tell us in English exactly what you want to do. First describe the nature of the file. Then describe what you want to do to the data in that file. Then describe the nature of the output that you want. Then give us an example of the code that you have tried to do this routine. Comment, with the code, what each line of the code does. Make that code as simple as possible and don't be afraid to break that code up onto many lines so that each line is as simple as possible. I'll then take a look at it.