Commands > OTU analysis
Making an OTU table (otutab command)
Convert OTU table
from frequencies to counts. The input file must be in
QIIME classic format except that the table
entries are floating point frequencies in the range 0 to 1.
The output file is specified by the -output option. It is written in QIIME classic format.
The desired total count for each sample is specified by the -sample_size
option, default 10000.
A frequency is converted to a count using count = frequency * sample_size
and rounding to the nearest integer. The total after conversion may be
slightly different from sample_size due to rounding.
usearch -otutab_freqs2counts otutable_freqs.txt -output otutable_counts.txt