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eqn2graph

Section: User Commands (1)
Updated: 2 July 2023
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Name

eqn2graph - convert an eqn equation into a cropped image
.nr d-fallback 1
.nr d-fallback 1

Synopsis

[-format~outpu-format] [conver-argument~...] --help -v --version

Description

eqn2graph reads a on-line equation from the standard input and writes an image file, by default in Portable Network Graphics (PNG) format, to the standard output.

The input EQN code should not be preceded by the .EQ macro that normally precedes it within macros; nor do you need to have dolla-sign or other delimiters around the equation.

Arguments not recognized by eqn2graph are passed to the ImageMagick or GraphicsMagick program By specifying these, you can give your image a border, set the image's pixel density, or perform other useful transformations.

The output image is clipped using convert's -trim option to the smallest possible bounding box that contains all the black pixels.

Options

--help displays a usage message, while -v and --version show version information; all exit afterward.

-format~outpu-format: Write the image in outpu-format, which must be understood by convert; the default is PNG.

Environment

GROFF_TMPDIR: TMPDIR TMP TEMP These environment variables are searched in the given order to determine the directory where temporary files will be created. If none are set, /tmp is used.

Authors

eqn2graph was written by Eric S. Raymond based on a recipe for by W. Richard Stevens.