MATLAB PARALLEL COMPUTING TOOLBOX - S Guide de l'utilisateur télécharger pdf (Page 640)

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101

11 Functions — Alphabetical List

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reference pages for codistributor1d and codistributor2dbc. To use the default

distribution scheme, you can specify a codistributor constructor without arguments. For

example:

spmd

C = true(8,codistributor1d());

end

C = true(sz, ___ ,codist,'noCommunication') specifies that no interworker

communication is to be performed when constructing a codistributed array, skipping

some error checking steps.

C = true(sz, ___ ,codist,'like',P) creates a codistributed array of true values

with the specified size and distribution scheme. If the codistributor argument is omitted,

the distribution scheme is taken from the codistributed array P.

Examples

Create Distributed True Matrix

Create a 1000-by-1000 distributed array of trues with underlying class double:

D = true(1000,'distributed');

Create Codistributed True Matrix

Create a 1000-by-1000 codistributed matrix of trues, distributed by its second dimension

(columns).

spmd(4)

C = true(1000,'codistributed');

end

With four workers, each worker contains a 1000-by-250 local piece of C.

Create a 1000-by-1000 codistributed matrix of trues, distributed by its columns.

spmd(4)

codist = codistributor('1d',2,100*[1:numlabs]);

C = true(1000,1000,codist);

end

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MATLAB PARALLEL COMPUTING TOOLBOX - S Guide de l'utilisateur Page 640

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