Mercurial > octave-nkf
view libinterp/corefcn/pinv.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 | 4f45eaf83908 |
children | f90c8372b7ba |
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/* Copyright (C) 1996-2015 John W. Eaton 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 "defun.h" #include "error.h" #include "gripes.h" #include "oct-obj.h" #include "utils.h" #include "ops.h" #include "ov-re-diag.h" #include "ov-cx-diag.h" #include "ov-flt-re-diag.h" #include "ov-flt-cx-diag.h" #include "ov-perm.h" DEFUN (pinv, args, , "-*- texinfo -*-\n\ @deftypefn {Built-in Function} {} pinv (@var{x})\n\ @deftypefnx {Built-in Function} {} pinv (@var{x}, @var{tol})\n\ Return the pseudoinverse of @var{x}.\n\ \n\ Singular values less than @var{tol} are ignored.\n\ \n\ If the second argument is omitted, it is taken to be\n\ \n\ @example\n\ tol = max (size (@var{x})) * sigma_max (@var{x}) * eps,\n\ @end example\n\ \n\ @noindent\n\ where @code{sigma_max (@var{x})} is the maximal singular value of @var{x}.\n\ @end deftypefn") { octave_value retval; int nargin = args.length (); if (nargin < 1 || nargin > 2) { print_usage (); return retval; } octave_value arg = args(0); int arg_is_empty = empty_arg ("pinv", arg.rows (), arg.columns ()); if (arg_is_empty < 0) return retval; else if (arg_is_empty > 0) return octave_value (Matrix ()); bool isfloat = arg.is_single_type (); if (arg.is_diag_matrix ()) { if (isfloat) { float tol = 0.0; if (nargin == 2) tol = args(1).float_value (); if (error_state) return retval; if (tol < 0.0) { error ("pinv: TOL must be greater than zero"); return retval; } if (arg.is_real_type ()) retval = arg.float_diag_matrix_value ().pseudo_inverse (tol); else retval = arg.float_complex_diag_matrix_value ().pseudo_inverse (tol); } else { double tol = 0.0; if (nargin == 2) tol = args(1).double_value (); if (error_state) return retval; if (tol < 0.0) { error ("pinv: TOL must be greater than zero"); return retval; } if (arg.is_real_type ()) retval = arg.diag_matrix_value ().pseudo_inverse (tol); else retval = arg.complex_diag_matrix_value ().pseudo_inverse (tol); } } else if (arg.is_perm_matrix ()) { retval = arg.perm_matrix_value ().inverse (); } else if (isfloat) { float tol = 0.0; if (nargin == 2) tol = args(1).float_value (); if (error_state) return retval; if (tol < 0.0) { error ("pinv: TOL must be greater than zero"); return retval; } if (arg.is_real_type ()) { FloatMatrix m = arg.float_matrix_value (); if (! error_state) retval = m.pseudo_inverse (tol); } else if (arg.is_complex_type ()) { FloatComplexMatrix m = arg.float_complex_matrix_value (); if (! error_state) retval = m.pseudo_inverse (tol); } else { gripe_wrong_type_arg ("pinv", arg); } } else { double tol = 0.0; if (nargin == 2) tol = args(1).double_value (); if (error_state) return retval; if (tol < 0.0) { error ("pinv: TOL must be greater than zero"); return retval; } if (arg.is_real_type ()) { Matrix m = arg.matrix_value (); if (! error_state) retval = m.pseudo_inverse (tol); } else if (arg.is_complex_type ()) { ComplexMatrix m = arg.complex_matrix_value (); if (! error_state) retval = m.pseudo_inverse (tol); } else { gripe_wrong_type_arg ("pinv", arg); } } return retval; } /* %!shared a, b, tol, hitol, d, u, x, y %! a = reshape (rand*[1:16], 4, 4); # Rank 2 matrix %! b = pinv (a); %! tol = 4e-14; %! hitol = 40*sqrt (eps); %! d = diag ([rand, rand, hitol, hitol]); %! u = rand (4); # Could be singular by freak accident %! x = inv (u)*d*u; %! y = pinv (x, sqrt (eps)); %! %!assert (a*b*a, a, tol) %!assert (b*a*b, b, tol) %!assert ((b*a)', b*a, tol) %!assert ((a*b)', a*b, tol) %!assert (x*y*x, x, -hitol) %!assert (y*x*y, y, -hitol) %!assert ((x*y)', x*y, hitol) %!assert ((y*x)', y*x, hitol) ## Clear shared variables %!shared ## Test pinv for Diagonal matrices %!test %! x = diag ([3 2 1 0 -0.5]); %! y = pinv (x); %! assert (typeinfo (y)(1:8), "diagonal"); %! assert (isa (y, "double")); %! assert (diag (y), [1/3, 1/2, 1, 0 1/-0.5]'); %! y = pinv (x, 1); %! assert (diag (y), [1/3 1/2 1 0 0]'); %! y = pinv (x, 2); %! assert (diag (y), [1/3 1/2 0 0 0]'); */