This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English verison of the page.

Note: This page has been translated by MathWorks. Please click here
To view all translated materals including this page, select Japan from the country navigator on the bottom of this page.


Default computational grid for 2-D block-cyclic distributed arrays


grid = codistributor2dbc.defaultLabGrid()


grid = codistributor2dbc.defaultLabGrid() returns a vector, grid = [nrow ncol], defining a computational grid of nrow-by-ncol workers in the open parallel pool, such that numlabs = nrow x ncol.

The grid defined by codistributor2dbc.defaultLabGrid is as close to a square as possible. The following rules define nrow and ncol:

  • If numlabs is a perfect square, nrow = ncol = sqrt(numlabs).

  • If numlabs is an odd power of 2, then nrow = ncol/2 = sqrt(numlabs/2).

  • nrow <= ncol.

  • If numlabs is a prime, nrow = 1, ncol = numlabs.

  • nrow is the greatest integer less than or equal to sqrt(numlabs) for which ncol = numlabs/nrow is also an integer.


View the computational grid layout of the default distribution scheme for the open parallel pool.

    grid = codistributor2dbc.defaultLabGrid
Was this topic helpful?