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annotate stripeMatrix.m @ 985:ad6de007e7f6 feature/timesteppers

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Convert Rungekutta4SecondOrder to take F(t,v,v_t) instead of matrices
author Jonatan Werpers <jonatan@werpers.com>
date Tue, 08 Jan 2019 12:34:29 +0100
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
diff changeset
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