nauty-pickg(1)
select graphs according to a variety of properties
SYNOPSIS
[pickg|countg]
[-fp#:#q -V] [--keys] [-constraints -v] [ifile [ofile]]
DESCRIPTION
-
countg : Count graphs according to their properties.
-
pickg : Select graphs according to their properties.
-
ifile, ofile : Input and output files.
-
'-' and missing names imply stdin and stdout.
-
Miscellaneous switches:
- -p# -p#:#
-
Specify range of input lines (first is 1)
May fail if input is incremental.
- -f
-
With -p, assume input lines of fixed length
(only used with a file in graph6/digraph6 format)
- -v
-
Negate all constraints
- -V
-
List properties of every input matching constraints.
- -l
-
Put a blank line whenever the first parameter changes,
if there are at least two parameters.
- -q
-
Suppress informative output.
-
Constraints:
-
Numerical constraints (shown here with following #) can take
a single integer value, or a range like #:#, #:, or :#. Each
can also be preceded by '~', which negates it. (For example,
-~D2:4 will match any maximum degree which is _not_ 2, 3, or 4.)
Constraints are applied to all input graphs, and only those
which match all constraints are counted or selected.
- -n#
-
number of vertices -e# number of edges
- -L#
-
number of loops -C strongly connected
- -d#
-
minimum (out-)degree -D# maximum (out-)degree
- -m#
-
vertices of min (out-)degree -M# vertices of max (out-)degree
- -u#
-
minimum (in-)degree -U# maximum (in-)degree
- -s#
-
vertices of min (out-)degree -S# vertices of max (out-)degree
- -r
-
regular -b bipartite
- -z#
-
radius -Z# diameter
- -g#
-
girth (0=acyclic) -Y# total number of cycles
- -T#
-
number of triangles -K# number of maximal cliques
- -B#
-
smallest side of some bipartition (0 if none)
- -H#
-
number of induced cycles
- -E
-
Eulerian (all degrees are even, connectivity not required)
- -a#
-
group size -o# orbits -F# fixed points -t vertex-transitive
- -c#
-
connectivity (only implemented for 0,1,2).
- -i#
-
min common nbrs of adjacent vertices; -I# maximum
- -j#
-
min common nbrs of non-adjacent vertices; -J# maximum
-
Sort keys:
- Counts are made for all graphs passing the constraints.
-
Counts
-
are given separately for each combination of values occurring for
the properties listed as sort keys. A sort key is introduced by
'--' and uses one of the letters known as constraints. These can
be combined: --n --e --r is the same as --ne --r and --ner.
The order of sort keys is significant.
-
The output format matches the input, except that sparse6 is used
to output an incremental graph whose predecessor is not output.
