estimate
Estimate approximate-index parameters (z, evidence bits, false-positive rate) before building an index with --approx, without touching any files.
obikmer estimate [OPTIONS]
Options
| Option | Default | Description |
|---|---|---|
-k, --kmer-size |
31 |
Kmer size used at query time (matches index's --kmer-size) |
-z, --findere-z |
none | Findere z parameter |
--evidence-bits |
none | Fingerprint bits per slot (b) |
--fp |
none | Target false-positive rate per z-window |
Any two of -z, --evidence-bits, --fp may be given; the third is derived using the same model as index --approx and reindex --approx (\(FP = 1 / 2^{b \cdot z}\)). The report printed to stdout includes: query \(k\), effective indexed \(k\) (\(k-z+1\)), \(z\), evidence bits, per-kmer false-positive rate, and per-z-window false-positive rate.