I first visualized the table I got after the dada2 command (qiime dada2 denoise-single with
--p-trim-left 13 and --p-trunc-len 230) and got:
And then for greengenes2 I run qiime greengenes2 non-v4-16s and visualized the mapped-table and got:
My data is V4 sequences but when I try qiime greengenes2 filter-features and then qiime greengenes2 taxonomy-from-table I get ‘No requested tips found’ error. After reading this post I understood that I can also run non-v4-16s command.
Thank you for the help!