The Contagion

Contagion measures the level of aggregation of a patch system compared with other types of patches. This index is sensitive to the aggregation of elements inside a patch. For instance, the maximal level of contagion in a matrix composed of two

covers have the maximum j j possible contagion for that ! !

configuration. In matrix B the ! !

possible for that configuration j j and the patches appear ____j._____!__________

interspersed ! !

Max Min different types of patches is observable when the two typologies each occupy half of the matrix. The minimum is reached when the two covers are distributed like a checkerboard (Fig. 7.3).

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