Mercurial > repos > public > sbplib

annotate diags.m @ 577:e45c9b56d50d feature/grids

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Add an Empty grid class The need turned up for the flexural code when we may or may not have a grid for the open water and want to plot that solution. In case there is no open water we need an empty grid to plot the empty gridfunction against to avoid errors.
author Jonatan Werpers <jonatan@werpers.com>
date Thu, 07 Sep 2017 09:16:12 +0200
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