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## [igraph] Segregating a graph

**From**: |
Thomas |

**Subject**: |
[igraph] Segregating a graph |

**Date**: |
Tue, 1 Apr 2014 13:16:03 +0100 |

`I am about to write a routine to achieve the following, and wanted to
``double check there's no pre-existing way to do this built into igraph.
`
1. Create a graph - say g <- watts.strogatz.game(1, 225, 5, 0.05)

`2. Assign a type to each node such that a node with degree x will have
``roughly a set percentage, say x*60%, of neighbours of a certain type.
``Initially I'm going to use two types (1,0).
`
For info a rough outline of how I'm planning to implement this is below.
Thank you
Thomas Chesney
==================
g <- watts.strogatz.game(1, 225, 5, 0.05)
Create a vector of 225 types, type <- rbinom(225, 1, 0.5)

`For each node z, set x1=degree(g,a)*60% to be the number nodes of type
``1 and x2=degree(g,a)*40% to be the number of nodes of type 2.
`

`For 1 to x1, for each Type 1 in the type vector, check the node with
``the same index's degree hasn't been exceeded yet and if not, join it
``to node z.
`

`For 1 to x2, for each Type 2 in the type vector, check the node with
``the same index's degree hasn't been exceeded yet and if not, join it
``to node z.
`

`If a node of a certain type cannot be found for node z, join it to a
``node of the other type.
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**[igraph] Segregating a graph**,
*Thomas* **<=**