Exclude sequences by alignment

This method aligns feature sequences to a set of reference sequences to identify sequences that hit/miss the reference within a specified perc_identity, evalue, and perc_query_aligned. This method could be used to define a positive filter, e.g., extract only feature sequences that align to a certain clade of bacteria; or to define a negative filter, e.g., identify sequences that align to contaminant or human DNA sequences that should be excluded from subsequent analyses. Note that filtering is performed based on the perc_identity, perc_query_aligned, and evalue thresholds (the latter only if method==BLAST and an evalue is set). Set perc_identity==0 and/or perc_query_aligned==0 to disable these filtering thresholds as necessary.