Mercurial > repos > public > sbplib

annotate diags.m @ 1149:1fe48cbd379a feature/rv

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Change Burgers2d to inviscid formulation. Rewrite to use opSets and fix the implementation of the Dirichlet conditions.
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Thu, 24 Jan 2019 09:05:44 +0100
parents 0b87863cb29c
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
412
5eb312dfe2ab Add full matrix equivalent of spdiags
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
1 function A = diags(B,d,m,n)
5eb312dfe2ab Add full matrix equivalent of spdiags
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
2 assert(size(B,1) == m);
5eb312dfe2ab Add full matrix equivalent of spdiags
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
3
5eb312dfe2ab Add full matrix equivalent of spdiags
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
4 A = repmat(B(:,1)*0, [1, n]);
5eb312dfe2ab Add full matrix equivalent of spdiags
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
5
5eb312dfe2ab Add full matrix equivalent of spdiags
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
6 for i = 1:size(B,2)
5eb312dfe2ab Add full matrix equivalent of spdiags
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
7 A(:,d(i)+ (1:m)) = A(:,d(i)+ (1:m)) + diag(B(:,i));
5eb312dfe2ab Add full matrix equivalent of spdiags
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
8 end
413
0b87863cb29c Add missing eol
Jonatan Werpers <jonatan@werpers.com>
parents: 412
diff changeset
9 end