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. 2013 Sep 19;8(9):e74025. doi: 10.1371/journal.pone.0074025

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© 2013 Johnson et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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The figure shows three different connectivity matrices with different levels of nestedness as measured by (i) our new nestedness index [Eq. (6)] and (ii) the standard nestedness “temperature’ calculator”. As can be readily seen, the most packed matrix corresponds to a very low temperature and to a high nestedness index () and, reciprocally, the least packed one exhibits a high temperature and an index close to its expected value for a random network ().

Inline graphic — The figure shows three different connectivity matrices with different levels of nestedness as measured by (i) our new nestedness index [Eq. (6)] and (ii) the standard nestedness “temperature’ calculator”. As can be readily seen, the most packed matrix corresponds to a very low temperature and to a high nestedness index () and, reciprocally, the least packed one exhibits a high temperature and an index close to its expected value for a random network ().