1// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
2// Copyright (C) INRIA
3//
4// Copyright (C) 2012 - 2016 - Scilab Enterprises
5//
6// This file is hereby licensed under the terms of the GNU GPL v2.0,
7// pursuant to article 5.3.4 of the CeCILL v.2.1.
8// This file was originally licensed under the terms of the CeCILL v2.1,
9// and continues to be available under such terms.
10// For more information, see the COPYING file which you should have received
11// along with this program.
12
13function r=%sp_k_sp(a,b)
14    //  a.*.b with a and b sparse
15
16    [ija,va,mna]=spget(a)
17    [ijb,vb,mnb]=spget(b)
18    ia=ija(:,1);ja=ija(:,2)
19    ib=ijb(:,1);jb=ijb(:,2)
20
21    ij=[((ia-ones(ia))*mnb(1)).*.ones(ib)+ones(ia).*.ib,..
22    ((ja-ones(ja))*mnb(2)).*.ones(jb)+ones(ia).*.jb]
23    r=sparse(ij,va.*.vb,mna.*mnb)
24endfunction
25