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5 Designing Paths for Entities

5-8

Use an Attribute to Select an Output Port

Consider the situation in which parcels are sorted among several delivery vehicles based

on the locations of the specified recipients. If each parcel is an entity, then you can attach

data to each entity to indicate the location of its recipient. To implement the sorting, set

the Switching criterion parameter in the Output Switch block to From attribute.

The example below illustrates the sorting process (but not the delivery process itself),

partitioning the delivery area into three geographic zones. An entity generator represents

sources of parcels addressed to one of the zones. After being marked with a randomly

chosen zone 1, 2, or 3 via the Set Attribute block, the parcels advance to the queue to

wait for sorting. The Single Server block models the small delay incurred in the sorting

process and sends each parcel through the Output Switch block to one of three entity

output ports. From there, the example merely counts the sorted entities destined for each

zone, but your own simulation might do something interesting with the outputs from the

switch.

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MATLAB SIMEVENTS RELEASE NOTES Guia do Utilizador Página 98