Thank you so much!! your suggestions really helped. I apologize for the formatting errors. I hope its not too bad this time.
Can I ask you one more question. With this input file (below):
I get the following output:
If the input file is something like this:
Then I want the program to output the following:
gene_a gene_b gene_c
The thing is I am looking for pairs for which column is equal to column1 and vice versa. This can happen for any combination of numbers (as I showed with three above a, b and c). Can you provide your suggestion in this case. I would really really appreciate it!