---
name: "qual_trim.py"
section: "1"
platform: "linux"
package: "dnapi"
version: "1.1-3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/qual_trim.py"
---

# qual\_trim.py(1)

Perform quality trimming for single-end reads.

## NAME

qual\_trim.py - Perform quality trimming for single-end reads.

## DESCRIPTION

usage: qual\_trim.py \[-h\] \[-b BASE\] \[-p PROB\] \[-q SCORE\] \[-l BP\] \[--illumina5\]

- \[--solexa\]

  FASTQ

Perform quality trimming for single-end reads.

### positional arguments:

- FASTQ

  including stdin or compressed file {zip,gz,tar,bz}

### optional arguments:

- **-h**, **--help**

  show this help message and exit

- **-b** BASE

  ASCII-encoded quality offset, e.g. 33 or 64 (default: 33)

- **-p** PROB

  error probability cutoff (default: 0.1)

- **-q** SCORE

  quality score cutoff (default: '-p 0.1')

- **-l** BP

  minimum read length in bp (default: 16)

- **--illumina5**

  Illumina 1.5+ encoding marked with 'B'

- **--solexa**

  Solexa encoding

## AUTHOR

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