Mercurial > octave
view scripts/legacy/vectorize.m @ 33577:2506c2d30b32 bytecode-interpreter tip
maint: Merge default to bytecode-interpreter
author | Arun Giridhar <arungiridhar@gmail.com> |
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date | Sat, 11 May 2024 18:49:01 -0400 |
parents | 2e484f9f1f18 |
children |
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######################################################################## ## ## Copyright (C) 2020-2024 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## 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 ## <https://www.gnu.org/licenses/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {@var{vfcn} =} vectorize (@var{fcn}) ## Create a vectorized version of the anonymous function or expression ## @var{fcn} by replacing all occurrences of @code{*}, @code{/}, etc., ## with @code{.*}, @code{./}, etc. ## ## Note that the transformation is extremely simplistic. Use of this ## function is strongly discouraged. It may be removed from a future ## version of Octave. ## @end deftypefn function vfcn = vectorize (fcn) persistent warned = false; if (! warned) warned = true; warning ("Octave:legacy-function", "vectorize is unreliable; its use is strongly discouraged\n"); endif if (nargin < 1) print_usage (); endif if (is_function_handle (fcn)) finfo = functions (fcn); if (! strcmp (finfo.type, "anonymous")) error ("vectorize: FCN must be a string or anonymous function handle"); endif expr = finfo.function; idx = index (expr, ")"); args = expr(1:idx); expr = expr(idx+1:end); new_expr = __vectorize__ (expr); vfcn = str2func ([args, new_expr]); elseif (ischar (fcn)) vfcn = __vectorize__ (fcn); else error ("vectorize: FCN must be a string or anonymous function handle"); endif endfunction %!assert (vectorize ("x.^2 + 1"), "x.^2 + 1") %!test %! fh = @(x) x.^2 + 1; %! finfo = functions (vectorize (fh)); %! assert (finfo.function, "@(x) x .^ 2 + 1"); %!assert (vectorize ("1e-3*y + 2e4*z"), "1e-3.*y + 2e4.*z") %!test %! fh = @(x, y, z) 1e-3*y + 2e4*z; %! finfo = functions (vectorize (fh)); %! assert (finfo.function, "@(x, y, z) 1e-3 .* y + 2e4 .* z"); %!assert (vectorize ("2^x^5"), "2.^x.^5") %!test %! fh = @(x) 2^x^5; %! finfo = functions (vectorize (fh)); %! assert (finfo.function, "@(x) 2 .^ x .^ 5"); ## Test input validation %!error <Invalid call> vectorize () %!error <FCN must be a string or anonymous function handle> vectorize (1)