Mercurial > octave-nkf
view scripts/image/viridis.m @ 20584:eb9e2d187ed2
maint: Use Octave coding conventions in scripts/ode/private dir.
* AbsRel_Norm.m, fuzzy_compare.m, hermite_quartic_interpolation.m,
integrate_adaptive.m, integrate_const.m, integrate_n_steps.m, kahan.m,
ode_struct_value_check.m, odepkg_event_handle.m, odepkg_structure_check.m,
runge_kutta_45_dorpri.m, starting_stepsize.m:
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Use double quotes rather than single quotes where possible.
Use ';' at end of keywords "return;" and "break;"
Use '##" for stand-alone comments and '#' for end-of-line comments.
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| author | Rik <rik@octave.org> |
|---|---|
| date | Sun, 04 Oct 2015 22:18:54 -0700 |
| parents | 2e7a09136516 |
| children |
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## Copyright (C) 2015 Eric Firing ## Copyright (C) 2015 Nathaniel J. Smith ## Copyright (C) 2015 Stefan van der Walt ## Copyright (C) 2015 Carlo de Falco ## ## 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{map} =} viridis () ## @deftypefnx {Function File} {@var{map} =} viridis (@var{n}) ## Create color colormap. The colors begin with dark purplish-blue and ## blue, range through green and end with yellow. ## ## The argument @var{n} must be a scalar. ## If unspecified, the length of the current colormap, or 64, is used. ## @seealso{colormap} ## @end deftypefn ## Author: Carlo de Falco ## PKG_ADD: colormap ("register", "viridis"); ## PKG_DEL: colormap ("unregister", "viridis"); ## This is a port of the the default matplotlib colormap "viridis" ## by Eric Firing to Octave, the original file is distributed under CC0: ## http://creativecommons.org/publicdomain/zero/1.0 function c = viridis (n = rows (colormap ())) if (nargin > 1) print_usage (); elseif (! isscalar (n)) error ("viridis: N must be a scalar"); endif viridi = [0.26700401 0.00487433 0.32941519 0.26851048 0.00960483 0.33542652 0.26994384 0.01462494 0.34137895 0.27130489 0.01994186 0.34726862 0.27259384 0.02556309 0.35309303 0.27380934 0.03149748 0.35885256 0.27495242 0.03775181 0.36454323 0.27602238 0.04416723 0.37016418 0.2770184 0.05034437 0.37571452 0.27794143 0.05632444 0.38119074 0.27879067 0.06214536 0.38659204 0.2795655 0.06783587 0.39191723 0.28026658 0.07341724 0.39716349 0.28089358 0.07890703 0.40232944 0.28144581 0.0843197 0.40741404 0.28192358 0.08966622 0.41241521 0.28232739 0.09495545 0.41733086 0.28265633 0.10019576 0.42216032 0.28291049 0.10539345 0.42690202 0.28309095 0.11055307 0.43155375 0.28319704 0.11567966 0.43611482 0.28322882 0.12077701 0.44058404 0.28318684 0.12584799 0.44496 0.283072 0.13089477 0.44924127 0.28288389 0.13592005 0.45342734 0.28262297 0.14092556 0.45751726 0.28229037 0.14591233 0.46150995 0.28188676 0.15088147 0.46540474 0.28141228 0.15583425 0.46920128 0.28086773 0.16077132 0.47289909 0.28025468 0.16569272 0.47649762 0.27957399 0.17059884 0.47999675 0.27882618 0.1754902 0.48339654 0.27801236 0.18036684 0.48669702 0.27713437 0.18522836 0.48989831 0.27619376 0.19007447 0.49300074 0.27519116 0.1949054 0.49600488 0.27412802 0.19972086 0.49891131 0.27300596 0.20452049 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0.96489353 0.90232311 0.12394051 0.97441665 0.90358991 0.13021494 0.98386829 0.90486726 0.13689671 0.99324789 0.90615657 0.1439362]; p = rows (viridi); c = interp1 (1:p, viridi, linspace (1, p, n), 'linear'); endfunction %!demo %! ## Show the 'viridis' colormap as an image %! image (1:256, linspace (0, 1, 256), repmat ((1:256)', 1, 256)); %! axis ([1, 256, 0, 1], "ticy", "xy"); %! colormap (viridis (256));