Global concatenation
Xs = gcat(X)
Xs = gcat(X,dim)
Xs = gcat(X,dim,targetlab)
Xs = gcat(X) concatenates the variant array
X from each worker in the second dimension. The result is
replicated on all workers.
Xs = gcat(X,dim) concatenates the variant array
X from each worker in the dimension indicated by
dim.
Xs = gcat(X,dim,targetlab) performs the reduction, and places
the result into res only on the worker indicated by
targetlab. res is set to
[] on all other workers.
With four workers,
Xs = gcat(labindex)
returns Xs = [1 2 3 4] on all four workers.