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## Re: [igraph] Generating scale-free networks with different exponents

**From**: |
Tamas Nepusz |

**Subject**: |
Re: [igraph] Generating scale-free networks with different exponents |

**Date**: |
Tue, 08 Nov 2011 17:12:56 +0100 |

**User-agent**: |
Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1 |

>*> degs <- sample(1:n, n, replace=TRUE, prob=(1:n)^(-scale))*
>* Depending on your exponent, it is possible that the generated degree*
>* sequence cannot be realized as a graph.*
Also note that you are sampling from 1:n, which means that n may be included
in the sample. However, in a graph with n vertices, the maximum degree may
only be n-1 if you are aiming for a simpe graph (which the VL generator
does). So, once "n" gets into the sample, the entire process will fail.
Best,
Tamas