+ execute
+ end
+
+ # Method to execute cluster_smallmem.
+ # NB sequences must be sorted with sortbylength or sortbysize.
+ def cluster_smallmem
+ # usearch -cluster_smallmem query.fasta -id 0.9 -centroids nr.fasta -uc clusters.uc
+ @command << "usearch -cluster_smallmem #{@infile} -id #{@options[:identity]} -uc #{@outfile}"
+ @command << "-strand both" if @options[:comp]
+
+ execute