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8
votes
9answers
15k views

Remove/delete sequences by ID from multifasta

I have a fasta file like this: >Id1 ATCCTT >Id2 ATTTTCCC >Id3 TTTCCCCAAAA >Id4 CCCTTTAAA I want to delete sequences that have the following IDs. <...
13
votes
4answers
686 views

How do I efficiently subset a very large line-based file?

This has come up repeatedly recently: I have a very large text file (in the order of several GiB) and I need to perform line-based subsetting for around 10,000 lines. There exist solutions for ...