Allocate space for sparse codistributed matrix
SD = codistributed.spalloc(M,N,nzmax)
SD = spalloc(M,N,nzmax,codist)
SD = codistributed.spalloc(M,N,nzmax) creates an
N all-zero sparse codistributed
matrix with room to hold
Optional arguments to
codistributed.spalloc 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. The allocated space for nonzero elements is consistent with the distribution of the matrix among the workers according to the
Partitionof the codistributor.
'noCommunication'— Specifies that no communication is to be performed when constructing the array, skipping some error checking steps. You can also use this argument with
SD = spalloc(M, N, nzmax, codistr).
SD = spalloc(M,N,nzmax,codist) is the same as
codistributed.spalloc(M,N,nzmax,codist). You can also use the optional
arguments with this syntax.
Allocate space for a 1000-by-1000 sparse codistributed matrix with room for up to 2000 nonzero elements. Use the default codistributor. Define several elements of the matrix.
spmd % codistributed array created inside spmd statement N = 1000; SD = codistributed.spalloc(N, N, 2*N); for ii=1:N-1 SD(ii,ii:ii+1) = [ii ii]; end end