De Bruijn graphs are labeled graphs representing the overlap of strings.

## Arguments

- m
Integer scalar, the size of the alphabet. See details below.

- n
Integer scalar, the length of the labels. See details below.

- ...
Passed to

`make_de_bruijn_graph()`

.

## Details

A de Bruijn graph represents relationships between strings. An alphabet of
`m`

letters are used and strings of length `n`

are considered. A
vertex corresponds to every possible string and there is a directed edge
from vertex `v`

to vertex `w`

if the string of `v`

can be
transformed into the string of `w`

by removing its first letter and
appending a letter to it.

Please note that the graph will have `m`

to the power `n`

vertices
and even more edges, so probably you don't want to supply too big numbers
for `m`

and `n`

.

De Bruijn graphs have some interesting properties, please see another source, e.g. Wikipedia for details.

## Author

Gabor Csardi csardi.gabor@gmail.com

## Examples

```
# de Bruijn graphs can be created recursively by line graphs as well
g <- make_de_bruijn_graph(2, 1)
make_de_bruijn_graph(2, 2)
#> IGRAPH 1f9e78f D--- 4 8 -- De-Bruijn graph 2-2
#> + attr: name (g/c), m (g/n), n (g/n)
#> + edges from 1f9e78f:
#> [1] 1->1 1->2 2->3 2->4 3->1 3->2 4->3 4->4
make_line_graph(g)
#> IGRAPH 2c2cc41 D--- 4 8 -- Line graph
#> + attr: name (g/c)
#> + edges from 2c2cc41:
#> [1] 1->1 3->1 1->2 3->2 2->3 4->3 2->4 4->4
```