I downloaded mature.fa files from mirbase database. it contains all of species but i want only human. is there any script/ Rpackage ect to extract only one species?
For those who don't know how your data looks like, it's probably most helpful to post an few entries from mature.fa to help you filter.
grep -A 1 "sapien" mature.fa > human.fa should be all you need.
grep -A 1 "sapien" mature.fa > human.fa
Alternatively you may be able to selectively download things from RNACentral. See this example. Limit datasets by options in left column.
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