Mercurial > octave-nkf
changeset 7102:a627f27c1e8e
[project @ 2007-11-06 17:02:11 by jwe]
| author | jwe |
|---|---|
| date | Tue, 06 Nov 2007 17:02:12 +0000 |
| parents | 2c5b14c60c6c |
| children | 1ed1a94735a6 |
| files | liboctave/ChangeLog scripts/linear-algebra/__norm__.m src/ChangeLog src/data.cc src/parse.h |
| diffstat | 5 files changed, 17 insertions(+), 9 deletions(-) [+] |
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--- a/liboctave/ChangeLog Tue Nov 06 16:26:13 2007 +0000 +++ b/liboctave/ChangeLog Tue Nov 06 17:02:12 2007 +0000 @@ -1,3 +1,9 @@ +2007-11-06 David Bateman <dbateman@free.fr> + + * MArray-def.h (MARRAY_NORM_BODY): Scale frobenius norm by infinity + norm to avoid issues of over- and underflow. From Rolf Fabian + <Rolf.Fabian@gmx.de>. + 2007-10-30 David Bateman <dbateman@free.fr> * DASRT-opts.in, LSODE-opts.in: Doc fixes for small book format.
--- a/scripts/linear-algebra/__norm__.m Tue Nov 06 16:26:13 2007 +0000 +++ b/scripts/linear-algebra/__norm__.m Tue Nov 06 17:02:12 2007 +0000 @@ -43,7 +43,7 @@ if (ndims(x) == 2 && (rows (x) == 1 || columns (x) == 1)) if (ischar (p)) if (strcmp (p, "fro")) - inf_norm = norm (x, "inf") + inf_norm = norm (x, "inf"); retval = inf_norm .* sqrt (sum (abs (x ./ inf_norm) .^ 2)); elseif (strcmp (p, "inf")) retval = max (abs (x)); @@ -69,7 +69,7 @@ else if (ischar (p)) if (strcmp (p, "fro")) - inf_norm = norm (x, "inf") + inf_norm = norm (x, "inf"); retval = inf_norm .* sqrt (sum (sum (abs (x ./ inf_norm) .^ 2))); elseif (strcmp (p, "inf")) retval = max (sum (abs (x')));
--- a/src/ChangeLog Tue Nov 06 16:26:13 2007 +0000 +++ b/src/ChangeLog Tue Nov 06 17:02:12 2007 +0000 @@ -1,14 +1,10 @@ 2007-11-06 John W. Eaton <jwe@octave.org> + * data.cc (Fnorm): New tests. + * defun-int.h (DEFINE_FUNX_INSTALLER_FUN3): Don't install function if check_version produces an error. -2007-11-06 David Bateman <dbateman@free.fr> - - * MArray-def.h (MARRAY_NORM_BODY): Scale frobenius norm by infinity - norm to avoid issues of over- and underflow. From Rolf Fabian - <Rolf.Fabian@gmx.de>. - 2007-11-05 John W. Eaton <jwe@octave.org> * pt-idx.cc (tree_index_expression::lvalue): Try to do a better
--- a/src/data.cc Tue Nov 06 16:26:13 2007 +0000 +++ b/src/data.cc Tue Nov 06 17:02:12 2007 +0000 @@ -2623,6 +2623,12 @@ %!assert(norm(m,2), 34, -eps); %!assert(norm(m,Inf), 34); %!assert(norm(m,"inf"), 34); +%!shared m2 +%! m2 = [1,2;3,4]; +%! flo = 1e-300; +%! fhi = 1e+300; +%!assert (norm (flo*m2, "fro"), sqrt (30)*flo, -eps) +%!assert (norm (fhi*m2, "fro"), sqrt (30)*fhi, -eps) */ // Compute various norms of the vector X.