Mercurial > octave-nkf
view libinterp/corefcn/mgorth.cc @ 20569:b70cc4bd8109
begin removal of global error_state variable
* gripes.h, gripes.cc (gripe_library_execution_error): Delete.
* error.cc (warning_state): Delete unused variable.
(reset_error_handler): Don't set warning_state or error_state.
(debug_or_throw_exception): New static function.
(verror): Don't check error_state.
(vmessage): Call debug_or_throw_exception instead of setting
error_state.
(error_1, error_2): Combine into single function, error_1 that prints
error message and ultimately calls debug_or_throw_exception.
(verror, verror_with_cfn, verror_with_id_cfn): Call error_1. Don't
check or set warning_state.
(error): Don't check error_state.
(Flasterror, Flasterr): Adapt to not using error_state.
(interpreter_try): Don't unwind_protect error_state.
* NEWS: Update.
* doc/interpreter/external.txi: Explain octave_execution_exception
instead of error_state for matrix addition example.
* jit-typeinfo.cc (octave_jit_gripe_nan_to_logical_conversion,
octave_jit_ginvalid_index, octave_jit_gindex_range,
octave_jit_paren_scalar, octave_jit_paren_scalar_subsasgn):
Don't catch octave_execution_exception.
* cellfun.cc (Fcellfun): Use exceptions instead of error_state.
* ls-mat-ascii.cc (save_mat_ascii_data): Likewise.
* mex.cc (mexCallMATLAB, mexEvalString): Likewise.
* variables.cc (safe_symbol_lookup): Likewise.
* svd.cc (Fsvd): Eliminate use of error_state.
* __magick_read__.cc (read_file, write_file): Likewise.
* variables.cc (generate_struct_completions): Eliminate use of
obsolete warning_state variable.
* ov-builtin.cc (octave_builtin::do_multi_index_op): Don't catch
octave_execution_exception and call gripe_library_execution_error.
* ov-class.cc (octave_class::reconstruct_exemplar): Eliminate use of
error_state. Catch possible octave_execution_exception in
do_multi_index_op.
* ov-mex-fcn.cc (octave_mex_function::do_multi_index_op): Eliminate
use of error_state. Catch possible octave_execution_exception in
call_mex.
* ov-fcn-handle.cc (octave_fcn_binder::maybe_binder): Eliminate use of
error_state.
* ov-oncleanup.cc (octave_oncleanup::~octave_oncleanup): Eliminate use
of error_state. Propagate possible octave_execution_exception from
do_multi_index_op.
* ov.cc (octave_value::assign, do_binary_op, do_unary_op,
octave_value::do_non_const_unary_op): Don't catch
octave_execution_exception here.
* oct-parse.in.yy (octave_base_parser::finish_colon_expression,
octave_base_parser::finish_array_list): Eliminate use of warning_state
and error_state.
(Feval, Fevalin): Use exceptions instead of error_state.
* pt-eval.cc, pt-eval.h (tree_evaluator::unwind_protect_exception):
New static variable.
* (tree_evaluator::visit_statement): Don't catch
octave_execution_exception here.
(tree_evaluator::visit_try_catch_command,
tree_evaluator::do_unwind_protect_cleanup): Eliminate use of error_state.
(tree_evaluator::visit_unwind_protect_command): Use
unwind_protect_exception to track whether an exception has occurred in
the try block.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Thu, 01 Oct 2015 16:18:19 -0400 |
parents | e914b5399c67 |
children |
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/* Copyright (C) 2009-2015 Carlo de Falco Copyright (C) 2010 VZLU Prague This file is part of Octave. Octave is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. Octave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #include "oct-norm.h" #include "defun.h" #include "error.h" #include "gripes.h" template <class ColumnVector, class Matrix, class RowVector> static void do_mgorth (ColumnVector& x, const Matrix& V, RowVector& h) { octave_idx_type Vc = V.columns (); h = RowVector (Vc + 1); for (octave_idx_type j = 0; j < Vc; j++) { ColumnVector Vcj = V.column (j); h(j) = RowVector (Vcj.hermitian ()) * x; x -= h(j) * Vcj; } h(Vc) = xnorm (x); if (real (h(Vc)) > 0) x /= h(Vc); } DEFUN (mgorth, args, nargout, "-*- texinfo -*-\n\ @deftypefn {Built-in Function} {[@var{y}, @var{h}] =} mgorth (@var{x}, @var{v})\n\ Orthogonalize a given column vector @var{x} with respect to a set of\n\ orthonormal vectors comprising the columns of @var{v} using the modified\n\ Gram-Schmidt method.\n\ \n\ On exit, @var{y} is a unit vector such that:\n\ \n\ @example\n\ @group\n\ norm (@var{y}) = 1\n\ @var{v}' * @var{y} = 0\n\ @var{x} = [@var{v}, @var{y}]*@var{h}'\n\ @end group\n\ @end example\n\ \n\ @end deftypefn") { octave_value_list retval; int nargin = args.length (); if (nargin != 2 || nargout > 2) { print_usage (); return retval; } octave_value arg_x = args(0); octave_value arg_v = args(1); if (arg_v.ndims () != 2 || arg_x.ndims () != 2 || arg_x.columns () != 1 || arg_v.rows () != arg_x.rows ()) { error ("mgorth: V should be a matrix, and X a column vector with" " the same number of rows as V."); return retval; } if (! arg_x.is_numeric_type () && ! arg_v.is_numeric_type ()) { error ("mgorth: X and V must be numeric"); } bool iscomplex = (arg_x.is_complex_type () || arg_v.is_complex_type ()); if (arg_x.is_single_type () || arg_v.is_single_type ()) { if (iscomplex) { FloatComplexColumnVector x = arg_x.float_complex_column_vector_value (); FloatComplexMatrix V = arg_v.float_complex_matrix_value (); FloatComplexRowVector h; do_mgorth (x, V, h); retval(1) = h; retval(0) = x; } else { FloatColumnVector x = arg_x.float_column_vector_value (); FloatMatrix V = arg_v.float_matrix_value (); FloatRowVector h; do_mgorth (x, V, h); retval(1) = h; retval(0) = x; } } else { if (iscomplex) { ComplexColumnVector x = arg_x.complex_column_vector_value (); ComplexMatrix V = arg_v.complex_matrix_value (); ComplexRowVector h; do_mgorth (x, V, h); retval(1) = h; retval(0) = x; } else { ColumnVector x = arg_x.column_vector_value (); Matrix V = arg_v.matrix_value (); RowVector h; do_mgorth (x, V, h); retval(1) = h; retval(0) = x; } } return retval; } /* %!test %! for ii=1:100 %! assert (abs (mgorth (randn (5, 1), eye (5, 4))), [0 0 0 0 1]', eps); %! endfor %!test %! a = hilb (5); %! a(:, 1) /= norm (a(:, 1)); %! for ii = 1:5 %! a(:, ii) = mgorth (a(:, ii), a(:, 1:ii-1)); %! endfor %! assert (a' * a, eye (5), 1e10); */