Syntax

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.

Examples

View labindex in spmd blocks and parfor-loops.

p = parpool('local',2);
spmd
    labindex
end

Lab 1: 
         1
  
Lab 2: 
        2

Using the same two-worker pool, p:

parfor a=1:4
    [a,labindex]
end

ans =
     3     1
ans =
     2     1
ans =
     1     1
ans =1
     4     1

See Also

labSendReceive | numlabs