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annotate stripeMatrix.m @ 1198:2924b3a9b921 feature/d2_compatible

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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 5cb99f56f55e
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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0be702829bb9 Generalized spdiag. Added function for createing a banded sparse matrix.
Jonatan Werpers <jonatan@werpers.com>
parents:
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1 % Creates a matrix of size n,m with the values of val on the diagonals diag.
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5cb99f56f55e Added some utility functions. Improved some documentation.
Jonatan Werpers <jonatan@werpers.com>
parents: 51
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2 % A = stripeMatrix(val,diags,n,m)
51
0be702829bb9 Generalized spdiag. Added function for createing a banded sparse matrix.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
3 function A = stripeMatrix(val,diags,n,m)
0be702829bb9 Generalized spdiag. Added function for createing a banded sparse matrix.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
4 default_arg('m',n);
0be702829bb9 Generalized spdiag. Added function for createing a banded sparse matrix.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
5
0be702829bb9 Generalized spdiag. Added function for createing a banded sparse matrix.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
6 D = ones(n,1)*val;
0be702829bb9 Generalized spdiag. Added function for createing a banded sparse matrix.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
7 A = spdiags(D,diags,n,m);
0be702829bb9 Generalized spdiag. Added function for createing a banded sparse matrix.
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
8 end