Mercurial > octave-nkf
view scripts/polynomial/ppjumps.m @ 18840:4a4edf0f2077 nkf-ready
fix LLVM 3.4 build (bug #41061)
* configure.ac: Call new functions OCTAVE_LLVM_RAW_FD_OSTREAM_API and
OCTAVE_LLVM_LEGACY_PASSMANAGER_API, check for Verifier.h header file
* m4/acinclude.m4 (OCTAVE_LLVM_RAW_FD_OSTREAM_API): New function to
detect correct raw_fd_ostream API
* m4/acinclude.m4 (OCTAVE_LLVM_LEGACY_PASSMANAGER_API): New function
to detect legacy passmanager API
* libinterp/corefcn/jit-util.h: Use legacy passmanager namespace if
necessary
* libinterp/corefcn/pt-jit.h (class tree_jit): Use legacy passmanager
class if necessary
* libinterp/corefcn/pt-jit.cc: Include appropriate header files
* libinterp/corefcn/pt-jit.cc (tree_jit::initialize): Use legacy
passmanager if necessary
* libinterp/corefcn/pt-jit.cc (tree_jit::optimize): Use correct API
* libinterp/corefcn/jit-typeinfo.cc: Include appropriate header file
author | Stefan Mahr <dac922@gmx.de> |
---|---|
date | Sun, 11 May 2014 02:28:33 +0200 |
parents | 0a8c35ae5ce1 |
children | 4197fc428c7d |
line wrap: on
line source
## Copyright (C) 2008-2013 VZLU Prague, a.s., Czech Republic ## ## 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/>. ## -*- texinfo -*- ## @deftypefn {Function File} {@var{jumps} =} ppjumps (@var{pp}) ## Evaluate the boundary jumps of a piecewise polynomial. ## If there are @math{n} intervals, and the dimensionality of @var{pp} is ## @math{d}, the resulting array has dimensions @code{[d, n-1]}. ## @seealso{mkpp} ## @end deftypefn function jumps = ppjumps (pp) if (nargin != 1) print_usage (); endif if (! (isstruct (pp) && strcmp (pp.form, "pp"))) error ("ppjumps: PP must be a structure"); endif ## Extract info. [x, P, n, k, d] = unmkpp (pp); nd = length (d) + 1; ## Offsets. dx = diff (x(1:n)); dx = repmat (dx, [prod(d), 1]); dx = reshape (dx, [d, n-1]); dx = shiftdim (dx, nd - 1); ## Use Horner scheme. if (k>1) llim = shiftdim (reshape (P(1:(n-1) * prod (d), 1), [d, n-1]), nd - 1); endif for i = 2 : k; llim .*= dx; llim += shiftdim (reshape (P(1:(n-1) * prod (d), i), [d, n-1]), nd - 1); endfor rlim = shiftdim (ppval (pp, x(2:end-1)), nd - 1); jumps = shiftdim (rlim - llim, 1); endfunction %!test %! p = [1 6 11 6]; %! x = linspace (5, 6, 4); %! y = polyval (p, x); %! pp = spline (x, y); %! jj = ppjumps (pp); %! assert (jj, [0 0], eps); %!test %! breaks = [0 1 2]; %! pp1 = poly (-[1 2 3]); %! pp2 = poly (-([1 2 3]+1)); %! pp = mkpp (breaks, [pp1;pp2]); %! assert (ppjumps (pp), 0, eps); %!test %! breaks = [0 1 2]; %! pp1 = poly (-[1 2 3]); %! pp2 = poly (([1 2 3]+1)); %! pp = mkpp (breaks, [pp1;pp2]); %! j = - 2 * polyval (pp1, 1); %! assert (ppjumps (pp), j, eps);