---
name: "nthll"
section: "1"
platform: "linux"
package: "ntcard"
version: "1.2.2+dfsg-9"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/nthll"
---

# nthll(1)

Streaming algorithm to estimate cardinality in genomics datasets

## NAME

nthll - Streaming algorithm to estimate cardinality in genomics datasets

## SYNOPSIS

**nthll** \[*OPTION*\]... *FILE(S)*...

## DESCRIPTION

Estimates distinct number of k-mers in FILE(S).

Acceptable file formats: fastq, fasta, sam, bam and in compressed formats gz, bz, zip, xz. Accepts a list of files by adding @ at the beginning of the list name.

-

  Options:

- **-t**, **--threads**=*N*

  use N parallel threads \[1\] (N\>=2 should be used when input files are \>=2)

- **-k**, **--kmer**=*N*

  the length of kmer \[64\]

- **--help**

  display this help and exit

**--version** output version information and exit

## REPORTING BUGS

Report bugs to https://github.com/bcgsc/ntCard/issues

## AUTHOR

 This manpage was written by Nilesh Patra for the Debian distribution and\
  can be used for any other usage of the program.