Mercurial > repos > public > sbplib

annotate +blockmatrix/multiply.m @ 1198:2924b3a9b921 feature/d2_compatible

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Add OpSet for fully compatible D2Variable, created from regular D2Variable by replacing d1 by first row of D1. Formal reduction by one order of accuracy at the boundary point.
author Martin Almquist <malmquist@stanford.edu>
date Fri, 16 Aug 2019 14:30:28 -0700
parents 288138d9586d
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
388
288138d9586d Add function to multiply blockmatrices.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
1 function C = multiply(A, B)
288138d9586d Add function to multiply blockmatrices.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
2 [n_a, m_a] = size(A);
288138d9586d Add function to multiply blockmatrices.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
3 [n_b, m_b] = size(B);
288138d9586d Add function to multiply blockmatrices.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
4
288138d9586d Add function to multiply blockmatrices.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
5 assert(m_a == n_b, 'Dimensions do not agree.')
288138d9586d Add function to multiply blockmatrices.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
6
288138d9586d Add function to multiply blockmatrices.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
7 C = cell(n_a, m_b);
288138d9586d Add function to multiply blockmatrices.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
8
288138d9586d Add function to multiply blockmatrices.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
9 for i = 1:n_a
288138d9586d Add function to multiply blockmatrices.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
10 for j = 1:m_b
288138d9586d Add function to multiply blockmatrices.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
11 C{i,j} = sparse(size(A{i,1},1), size(B{1,j},2));
288138d9586d Add function to multiply blockmatrices.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
12 for k = 1:n_b
288138d9586d Add function to multiply blockmatrices.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
13 C{i,j} = C{i,j} + A{i,k}*B{k,j};
288138d9586d Add function to multiply blockmatrices.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
14 end
288138d9586d Add function to multiply blockmatrices.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
15 end
288138d9586d Add function to multiply blockmatrices.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
16 end
288138d9586d Add function to multiply blockmatrices.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
17 end