Mercurial > octave-libtiff
view scripts/general/pol2cart.m @ 27978:a4268efb7334
maint: Eliminate single "Author:" lines from code base.
* color-picker.cc, color-picker.h, octave-qscintilla.cc, octave-qscintilla.h,
octave-txt-lexer.cc, octave-txt-lexer.h, balance.cc, kron.cc, lookup.cc,
ls-hdf5.cc, ls-mat5.cc, ls-oct-text.cc, sylvester.cc, tsearch.cc, jit-ir.cc,
jit-ir.h, jit-typeinfo.cc, jit-typeinfo.h, jit-util.cc, jit-util.h, pt-jit.cc,
pt-jit.h, Array-jit.cc, bsxfun.h, url-transfer.cc, url-transfer.h, acosd.m,
acotd.m, acscd.m, asecd.m, asind.m, atand.m, cosd.m, cotd.m, cscd.m, secd.m,
sind.m, tand.m, cart2pol.m, cart2sph.m, curl.m, del2.m, divergence.m, flip.m,
pol2cart.m, randi.m, sortrows.m, sph2cart.m, griddata3.m, griddatan.m,
rectint.m, voronoi.m, dialog.m, guidata.m, guihandles.m, __file_filter__.m,
__fltk_file_filter__.m, __get_funcname__.m, __is_function__.m,
__uigetdir_fltk__.m, __uigetfile_fltk__.m, __uiobject_split_args__.m,
__uiputfile_fltk__.m, uibuttongroup.m, uicontextmenu.m, uicontrol.m,
uigetdir.m, uigetfile.m, uimenu.m, uipanel.m, uipushtool.m, uiputfile.m,
uiresume.m, uitoggletool.m, uitoolbar.m, uiwait.m, doc.m, autumn.m, bone.m,
cmpermute.m, cmunique.m, cool.m, copper.m, cubehelix.m, flag.m, frame2im.m,
hot.m, hsv.m, hsv2rgb.m, im2frame.m, imfinfo.m, imformats.m, iscolormap.m,
jet.m, pink.m, prism.m, __imfinfo__.m, rainbow.m, rgb2hsv.m, spinmap.m,
spring.m, viridis.m, white.m, winter.m, importdata.m, strmatch.m, bandwidth.m,
isbanded.m, isdiag.m, istril.m, istriu.m, krylov.m, linsolve.m, logm.m,
lscov.m, subspace.m, bunzip2.m, compare_versions.m, edit.m, fullfile.m,
getfield.m, gunzip.m, inputParser.m, license.m, nargchk.m, narginchk.m,
nthargout.m, python.m, setfield.m, tar.m, unpack.m, ver.m, zip.m, odeplot.m,
fminbnd.m, fminunc.m, fsolve.m, fzero.m, glpk.m, humps.m, pathdef.m,
savepath.m, diffuse.m, lighting.m, material.m, shading.m, specular.m,
contour.m, ellipsoid.m, isocaps.m, isocolors.m, isonormals.m, isosurface.m,
light.m, pcolor.m, __interp_cube__.m, __marching_cube__.m, __patch__.m,
__stem__.m, reducepatch.m, reducevolume.m, ribbon.m, shrinkfaces.m, slice.m,
stem.m, surf.m, surfl.m, tetramesh.m, waterfall.m, __actual_axis_position__.m,
__next_line_color__.m, allchild.m, figure.m, findall.m, findobj.m, gcf.m,
hggroup.m, isprop.m, ndgrid.m, __add_default_menu__.m, saveas.m,
__splinefit__.m, prefdir.m, preferences.m, profexplore.m, profexport.m,
profile.m, profshow.m, setdiff.m, freqz.m, freqz_plot.m, sinc.m, unwrap.m,
pcr.m, qmr.m, sprandn.m, betaincinv.m, cosint.m, ellipke.m, factor.m,
gammaincinv.m, legendre.m, nchoosek.m, primes.m, invhilb.m, toeplitz.m,
erase.m, mat2str.m, strtrim.m, validatestring.m, fail.m, compare_plot_demos.m,
dump_demos.m, html_compare_plot_demos.m, addtodate.m, datenum.m, jit.tst:
Eliminate single "Author:" lines from code base.
author | Rik <rik@octave.org> |
---|---|
date | Tue, 21 Jan 2020 12:53:13 -0800 |
parents | bd51beb6205e |
children | a23da76e0693 0a5b15007766 |
line wrap: on
line source
######################################################################## ## ## Copyright (C) 2000-2020 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{x}, @var{y}] =} pol2cart (@var{theta}, @var{r}) ## @deftypefnx {} {[@var{x}, @var{y}, @var{z}] =} pol2cart (@var{theta}, @var{r}, @var{z}) ## @deftypefnx {} {[@var{x}, @var{y}] =} pol2cart (@var{P}) ## @deftypefnx {} {[@var{x}, @var{y}, @var{z}] =} pol2cart (@var{P}) ## @deftypefnx {} {@var{C} =} pol2cart (@dots{}) ## Transform polar or cylindrical coordinates to Cartesian coordinates. ## ## The inputs @var{theta}, @var{r}, (and @var{z}) must be the same shape, or ## scalar. If called with a single matrix argument then each row of @var{P} ## represents the polar/(cylindrical) coordinate (@var{theta}, @var{r} ## (, @var{z})). ## ## @var{theta} describes the angle relative to the positive x-axis. ## ## @var{r} is the distance to the z-axis (0, 0, z). ## ## If only a single return argument is requested then return a matrix @var{C} ## where each row represents one Cartesian coordinate ## (@var{x}, @var{y} (, @var{z})). ## @seealso{cart2pol, sph2cart, cart2sph} ## @end deftypefn function [x, y, z] = pol2cart (theta, r, z = []) if (nargin < 1 || nargin > 3) print_usage (); endif if (nargin == 1) if (! (isnumeric (theta) && ismatrix (theta) && (columns (theta) == 2 || columns (theta) == 3))) error ("pol2cart: matrix input must have 2 or 3 columns [THETA, R (, Z)]"); endif if (columns (theta) == 3) z = theta(:,3); endif r = theta(:,2); theta = theta(:,1); elseif (nargin == 2) if (! isnumeric (theta) || ! isnumeric (r)) error ("pol2cart: THETA, R must be numeric arrays of the same size, or scalar"); endif [err, theta, r] = common_size (theta, r); if (err) error ("pol2cart: THETA, R must be numeric arrays of the same size, or scalar"); endif elseif (nargin == 3) if (! isnumeric (theta) || ! isnumeric (r) || ! isnumeric (z)) error ("pol2cart: THETA, R, Z must be numeric arrays of the same size, or scalar"); endif [err, theta, r, z] = common_size (theta, r, z); if (err) error ("pol2cart: THETA, R, Z must be numeric arrays of the same size, or scalar"); endif endif x = r .* cos (theta); y = r .* sin (theta); if (nargout <= 1) if (isempty (z)) x = [x(:), y(:)]; else x = [x(:), y(:), z(:)]; endif endif endfunction %!test %! t = [0, 0.5, 1] * pi; %! r = 1; %! [x, y] = pol2cart (t, r); %! assert (x, [1, 0, -1], sqrt (eps)); %! assert (y, [0, 1, 0], sqrt (eps)); %!test %! t = [0, 1, 1] * pi/4; %! r = sqrt (2) * [0, 1, 2]; %! C = pol2cart (t, r); %! assert (C(:,1), [0; 1; 2], sqrt (eps)); %! assert (C(:,2), [0; 1; 2], sqrt (eps)); %!test %! t = [0, 1, 1] * pi/4; %! r = sqrt (2) * [0, 1, 2]; %! z = [0, 1, 2]; %! [x, y, z2] = pol2cart (t, r, z); %! assert (x, [0, 1, 2], sqrt (eps)); %! assert (y, [0, 1, 2], sqrt (eps)); %! assert (z2, z); %!test %! t = 0; %! r = [0, 1, 2]; %! z = [0, 1, 2]; %! [x, y, z2] = pol2cart (t, r, z); %! assert (x, [0, 1, 2], sqrt (eps)); %! assert (y, [0, 0, 0], sqrt (eps)); %! assert (z2, z); %!test %! t = [1, 1, 1]*pi/4; %! r = 1; %! z = [0, 1, 2]; %! [x, y, z2] = pol2cart (t, r, z); %! assert (x, [1, 1, 1] / sqrt (2), eps); %! assert (y, [1, 1, 1] / sqrt (2), eps); %! assert (z2, z); %!test %! t = 0; %! r = [1, 2, 3]; %! z = 1; %! [x, y, z2] = pol2cart (t, r, z); %! assert (x, [1, 2, 3], eps); %! assert (y, [0, 0, 0] / sqrt (2), eps); %! assert (z2, [1, 1, 1]); %!test %! P = [0, 0; pi/4, sqrt(2); pi/4, 2*sqrt(2)]; %! C = [0, 0; 1, 1; 2, 2]; %! assert (pol2cart (P), C, sqrt (eps)); %!test %! P = [0, 0, 0; pi/4, sqrt(2), 1; pi/4, 2*sqrt(2), 2]; %! C = [0, 0, 0; 1, 1, 1; 2, 2, 2]; %! assert (pol2cart (P), C, sqrt (eps)); %!test %! r = ones (1, 1, 1, 2); %! r(1, 1, 1, 2) = 2; %! t = pi/2 * r; %! [x, y] = pol2cart (t, r); %! X = zeros (1, 1, 1, 2); %! X(1, 1, 1, 2) = -2; %! Y = zeros (1, 1, 1, 2); %! Y(1, 1, 1, 1) = 1; %! assert (x, X, 2*eps); %! assert (y, Y, 2*eps); %!test %! [t, r, Z] = meshgrid ([0, pi/2], [1, 2], [0, 1]); %! [x, y, z] = pol2cart (t, r, Z); %! X = zeros(2, 2, 2); %! X(:, 1, 1) = [1; 2]; %! X(:, 1, 2) = [1; 2]; %! Y = zeros(2, 2, 2); %! Y(:, 2, 1) = [1; 2]; %! Y(:, 2, 2) = [1; 2]; %! assert (x, X, eps); %! assert (y, Y, eps); %! assert (z, Z); ## Test input validation %!error pol2cart () %!error pol2cart (1,2,3,4) %!error <matrix input must have 2 or 3 columns> pol2cart ({1,2,3}) %!error <matrix input must have 2 or 3 columns> pol2cart (ones (3,3,2)) %!error <matrix input must have 2 or 3 columns> pol2cart ([1]) %!error <matrix input must have 2 or 3 columns> pol2cart ([1,2,3,4]) %!error <numeric arrays of the same size> pol2cart ({1,2,3}, [1,2,3]) %!error <numeric arrays of the same size> pol2cart ([1,2,3], {1,2,3}) %!error <numeric arrays of the same size> pol2cart (ones (3,3,3), ones (3,2,3)) %!error <numeric arrays of the same size> pol2cart ({1,2,3}, [1,2,3], [1,2,3]) %!error <numeric arrays of the same size> pol2cart ([1,2,3], {1,2,3}, [1,2,3]) %!error <numeric arrays of the same size> pol2cart ([1,2,3], [1,2,3], {1,2,3}) %!error <numeric arrays of the same size> pol2cart (ones (3,3,3), 1, ones (3,2,3)) %!error <numeric arrays of the same size> pol2cart (ones (3,3,3), ones (3,2,3), 1)