How to print out mapped data in SHRiMP2

[smallfish]

Dear all,

I'm new here and a beginner of genome sequencing. Right now we are using SHRiMP2 to map RNAseq data. However, the report includes all the mapped and unmapped data (huge data file). Anyone may kindly tell me how to filter out the unmapped data before saving it? I read through the README file, but could find out a solution.

Thanks so much for any reply.