---
name: "plscompression"
section: "3plplot"
platform: "linux"
package: "plplot-doc"
version: "5.15.0+dfsg2-15"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/plscompression"
---

# plscompression(3plplot)

Set device-compression level

## NAME

**plscompression** - Set device-compression level

## SYNOPSIS

**plscompression**(*compression*)

## DESCRIPTION

Set device-compression level.  Only used for drivers that provide compression.  This function, if used, should be invoked before a call to [**plinit**(3plplot)](/plinit/3plplot.md).

Redacted form: **plscompression(compression)**

This function is used in example 31.

## ARGUMENTS

- *compression* (**PLINT**(3plplot), input)

  The desired compression level. This is a device-dependent value. Currently only the jpeg and png devices use these values. For jpeg value is the jpeg quality which should normally be in the range 0-95. Higher values denote higher quality and hence larger image sizes. For png values are in the range -1 to 99. Values of 0-9 are taken as the compression level for zlib. A value of -1 denotes the default zlib compression level. Values in the range 10-99 are divided by 10 and then used as the zlib compression level. Higher compression levels correspond to greater compression and small file sizes at the expense of more computation.

## AUTHORS

Many developers (who are credited at http://plplot.org/credits.php) have contributed to PLplot over its long history.

## SEE ALSO

PLplot documentation at http://plplot.org/documentation.php.