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eqn2graph - convert an EQN equation into a cropped image


eqn2graph [ -unsafe ] [ -format fmt ]


Reads an EQN equation (one line) as input; produces an image file (by default in Portable
Network Graphics format) suitable for the Web as output.

Your input EQN code should not have the .EQ/.EN preamble that normally precedes it within
groff(1) macros; nor do you need to have dollar-sign or other delimiters around the

The output image will be clipped to the smallest possible bounding box that contains all
the black pixels. Older versions of convert(1) will produce a black-on-white graphic;
newer ones may produce a black-on-transparent graphic. By specifying command-line options
to be passed to convert(1) you can give it a border, force the background transparent, set
the image's pixel density, or perform other useful transformations.

This program uses eqn(1), groff(1), and the ImageMagick convert(1) program. These
programs must be installed on your system and accessible on your $PATH for eqn2graph to


Run groff(1) in the `unsafe' mode enabling the PIC macro sh to execute arbitrary
commands. The default is to forbid this.

-format fmt
Specify an output format; the default is PNG (Portable Network Graphics). Any
format that convert(1) can emit is supported.

Command-line switches and arguments not listed above are passed to convert(1).

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