# scotch_gmk_hy (1) - Linux Manuals

## scotch_gmk_hy: create source graphs

## NAME

**gmk_hy, gmk_m2, gmk_m3, gmk_ub2**- create source graphs

## SYNOPSIS

gmk_hy[options]dim[ofile]gmk_m2[options] [-gcfile]dimXdimY[ofile]gmk_m3[options] [-gcfile]dimXdimYdimZ[ofile]gmk_ub2[options]dim

## DESCRIPTION

The**gmk_*** programs create source graph files for some common, regular topologies.

**gmk_hy** creates a hypercube of dimension *dim*.

**gmk_m2** creates a 2D regular grid of dimensions *dimX* and *dimY*.

**gmk_m3** creates a 3D regular grid of dimensions *dimX*, *dimY* and *dimZ*.

**gmk_ub2** creates an unoriented de Bruijn graph of dimension *dim*.

## OPTIONS

**-b**base-
For
**gmk_m2**and**gmk_m3**only. Output graphs with base value set to base. Default value is 0. **-e**-
For
**gmk_m2**only. Build a 8-neighbor grid rather than a 4-neighbor grid. **-g***cfile*-
For
**gmk_m2**and**gmk_m3**only. Output graph vertex coordinates (that is, geometry data to be used by**gout**(1)) in file*cfile*. **-h**- Display some help.
**-t**-
For
**gmk_m2**and**gmk_m3**only. Create torus graphs, that is, graphs such that there exist loop edges between vertices of rank 0 and (*dim*-1) in every dimension. **-V**- Display program version and copyright.

## EXAMPLE

Create a 5x7 grid along with its geometry:

$ gmk_m2 5 7 -g/tmp/m5x7.xyz /tmp/m5x7.grf

## AUTHOR

Francois Pellegrini <francois.pellegrini [at] labri.fr>