User`s guide

sparse

11-285

Create a sparse codistributed array from vectors of indices and a distributed array of

element values:

r = [ 1 1 4 4 8];

c = [ 1 4 1 4 8];

v = [10 20 30 40 0];

V = distributed(v);

spmd

SC = sparse(r,c,V);

end

In this example, even though the fifth element of the value array v is 0, the size of the

result is an 8–by-8 matrix because of the corresponding maximum indices in r and c.

Matrix SC is considered codistributed when viewed inside an spmd block, and distributed

when viewed from the client workspace. To view a full version of the matrix, the full

function converts this distributed sparse array to a full distributed array:

S = full(SC)

10 0 0 20 0 0 0 0

0 0 0 0 0 0 0 0

30 0 0 40 0 0 0 0

0 0 0 0 0 0 0 0