exist - Check whether Composite is defined on labs
Syntax
h = exist(C, labidx)
h = exist(C)
Description
h = exist(C, labidx) returns true if
the entry in Composite C has a defined value on
the lab with labindex labidx, false otherwise.
In the general case where labidx is an array,
the output h is an array of the same size as labidx,
and h(i) indicates whether the Composite entry labidx(i) has
a defined value.
h = exist(C) is equivalent to h
= exist(C, 1:length(C)).
If exist(C, labidx) returns true, C(labidx) does
not throw an error, provided that the values of C on
those labs are serializable. The function throws an error if the lab
indices are invalid.
Examples
Define a variable on a random number of labs. Check on which
labs the Composite entries are defined, and get all those values:
spmd
if rand() > 0.5
c = labindex;
end
end
ind = exist(c);
cvals = c(ind);
See Also
Composite
 | distributed.zeros | | findJob |  |
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