codistributed.cell - Create codistributed cell array - MATLAB (original) (raw)

Create codistributed cell array

Syntax

C = codistributed.cell(n) C = codistributed.cell(m,n,p,...) C = codistributed.cell([m,n,p,...]) C = cell(n,codist) C = cell(m,n,p,...,codist) C = cell([m,n,p,...],codist)

Description

C = codistributed.cell(n) creates an n-by-n codistributed array of underlying class cell, distributing along columns.

C = codistributed.cell(m,n,p,...) or C = codistributed.cell([m,n,p,...]) creates an m-by-n-by-p-by-... codistributed array of underlying class cell, using a default scheme of distributing along the last nonsingleton dimension.

Optional arguments to codistributed.cell must be specified after the required arguments, and in the following order:

• codist — A codistributor object specifying the distribution scheme of the resulting array. If omitted, the array is distributed using the default distribution scheme. For information on constructing codistributor objects, see the reference pages for codistributor1d and codistributor2dbc.
• 'noCommunication' — Specifies that no communication is to be performed when constructing the array, skipping some error checking steps.

C = cell(n,codist) is the same as C = codistributed.cell(n, codist). You can also use the 'noCommunication' object with this syntax. To use the default distribution scheme, specify a codistributor constructor without arguments. For example:

spmd C = cell(8,codistributor1d()); end

C = cell(m,n,p,...,codist) and C = cell([m,n,p,...],codist) are the same as C = codistributed.cell(m,n,p,...) and C = codistributed.cell([m,n,p,...]), respectively. You can also use the optional 'noCommunication' argument with this syntax.

Examples

With four workers,

spmd(4) C = codistributed.cell(1000); end

creates a 1000-by-1000 distributed cell array C, distributed by its second dimension (columns). Each worker contains a 1000-by-250 local piece of C.

spmd(4) codist = codistributor1d(2, 1:spmdSize); C = cell(10, 10, codist); end

creates a 10-by-10 codistributed cell array C, distributed by its columns. Each worker contains a 10-by-spmdIndex local piece of C.

Version History

Introduced in R2009b