User`s guide

11 Functions — Alphabetical List

11-152

labindex

Index of this worker

Syntax

id = labindex

Description

id = labindex returns the index of the worker currently executing the function.

labindex is assigned to each worker when a job begins execution, and applies only for

the duration of that job. The value of labindex spans from 1 to n, where n is the number

of workers running the current job, defined by numlabs.

More About

Tips

In an spmd block, because you have access to all workers individually and control what

gets executed on them, each worker has a unique labindex.

However, inside a parfor-loop, labindex always returns a value of 1.