retrieving upstream and downstream region from a given sequence position

Question

[harpreetmanku04]

Hello, I want to extract upstream and downstream regions from a given sequence. can any one provide me a perl script or R script. See I have an oligonucleotide and I want to extract 100-100 +/- region for this oligonucleotide sequence.

[iraun]

Maybe this post could help you: upstream and downstream regions extraction

[Prakki Rama]

Check this similar biostars post