octave-nkf: scripts/image/hot.m annotate

annotate scripts/image/hot.m @ 20595:c1a6c31ac29a

eliminate more simple uses of error_state * ov-classdef.cc: Eliminate simple uses of error_state.

author	John W. Eaton <jwe@octave.org>
date	Tue, 06 Oct 2015 00:20:02 -0400
parents	7503499a252b
children

rev	line source
19731 4197fc428c7d maint: Update copyright notices for 2015. John W. Eaton <jwe@octave.org> parents: 19647 diff changeset	1 ## Copyright (C) 1999-2015 Kai Habel
6788 c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	2 ##
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	3 ## This file is part of Octave.
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	4 ##
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	5 ## Octave is free software; you can redistribute it and/or modify it
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	6 ## under the terms of the GNU General Public License as published by
7016 93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6791 diff changeset	7 ## the Free Software Foundation; either version 3 of the License, or (at
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6791 diff changeset	8 ## your option) any later version.
6788 c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	9 ##
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	10 ## Octave is distributed in the hope that it will be useful, but
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	13 ## General Public License for more details.
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	14 ##
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	15 ## You should have received a copy of the GNU General Public License
7016 93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6791 diff changeset	16 ## along with Octave; see the file COPYING. If not, see
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6791 diff changeset	17 ## <http://www.gnu.org/licenses/>.
6788 c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	18
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	19 ## -- texinfo --
11420 466ba499eff5 Update docstrings for colormap files. Rik <octave@nomad.inbox5.com> parents: 10433 diff changeset	20 ## @deftypefn {Function File} {@var{map} =} hot ()
466ba499eff5 Update docstrings for colormap files. Rik <octave@nomad.inbox5.com> parents: 10433 diff changeset	21 ## @deftypefnx {Function File} {@var{map} =} hot (@var{n})
11587 c792872f8942 all script files: untabify and strip trailing whitespace John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	22 ## Create color colormap. This colormap ranges from black through dark red,
c792872f8942 all script files: untabify and strip trailing whitespace John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	23 ## red, orange, yellow, to white.
20193 7503499a252b doc: Update docstrings to have one sentence summary as first line. Rik <rik@octave.org> parents: 19867 diff changeset	24 ##
11587 c792872f8942 all script files: untabify and strip trailing whitespace John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	25 ## The argument @var{n} must be a scalar.
11420 466ba499eff5 Update docstrings for colormap files. Rik <octave@nomad.inbox5.com> parents: 10433 diff changeset	26 ## If unspecified, the length of the current colormap, or 64, is used.
6788 c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	27 ## @seealso{colormap}
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	28 ## @end deftypefn
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	29
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	30 ## Author: Kai Habel <kai.habel@gmx.de>
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	31
14640 b9c02ee24de1 new colormap options Carnë Draug <carandraug+dev@gmail.com> parents: 14279 diff changeset	32 ## PKG_ADD: colormap ("register", "hot");
b9c02ee24de1 new colormap options Carnë Draug <carandraug+dev@gmail.com> parents: 14279 diff changeset	33 ## PKG_DEL: colormap ("unregister", "hot");
b9c02ee24de1 new colormap options Carnë Draug <carandraug+dev@gmail.com> parents: 14279 diff changeset	34
19647 e8e3a89fa370 Fix colormap functions when N is not of class double (bug #44070) Carnë Draug <carandraug@octave.org> parents: 17744 diff changeset	35 function map = hot (n = rows (colormap ()))
6788 c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	36
19647 e8e3a89fa370 Fix colormap functions when N is not of class double (bug #44070) Carnë Draug <carandraug@octave.org> parents: 17744 diff changeset	37 if (nargin > 1)
6788 c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	38 print_usage ();
19647 e8e3a89fa370 Fix colormap functions when N is not of class double (bug #44070) Carnë Draug <carandraug@octave.org> parents: 17744 diff changeset	39 elseif (! isscalar (n))
e8e3a89fa370 Fix colormap functions when N is not of class double (bug #44070) Carnë Draug <carandraug@octave.org> parents: 17744 diff changeset	40 error ("hot: N must be a scalar");
6788 c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	41 endif
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	42
11420 466ba499eff5 Update docstrings for colormap files. Rik <octave@nomad.inbox5.com> parents: 10433 diff changeset	43 if (n == 1)
14641 5f1d4def40e1 improve compatibility of colormap functions Carnë Draug <carandraug+dev@gmail.com> parents: 14640 diff changeset	44 map = [1, 1, 1];
16466 ac332eb727dd Simplify calculation of colormaps Rik <rik@octave.org> parents: 16366 diff changeset	45 elseif (n == 2)
ac332eb727dd Simplify calculation of colormaps Rik <rik@octave.org> parents: 16366 diff changeset	46 map = [1, 1, 1/2
ac332eb727dd Simplify calculation of colormaps Rik <rik@octave.org> parents: 16366 diff changeset	47 1, 1, 1 ];
ac332eb727dd Simplify calculation of colormaps Rik <rik@octave.org> parents: 16366 diff changeset	48 elseif (n > 2)
16366 6964e6b92fc1 hot.m: Make colormap compatible with Matlab (bug #36473). Rik <rik@octave.org> parents: 15720 diff changeset	49 idx = floor (3/8 * n);
6964e6b92fc1 hot.m: Make colormap compatible with Matlab (bug #36473). Rik <rik@octave.org> parents: 15720 diff changeset	50 nel = idx;
6964e6b92fc1 hot.m: Make colormap compatible with Matlab (bug #36473). Rik <rik@octave.org> parents: 15720 diff changeset	51
6964e6b92fc1 hot.m: Make colormap compatible with Matlab (bug #36473). Rik <rik@octave.org> parents: 15720 diff changeset	52 r = ones (n, 1);
16466 ac332eb727dd Simplify calculation of colormaps Rik <rik@octave.org> parents: 16366 diff changeset	53 r(1:idx, 1) = [1:nel]' / nel;
16366 6964e6b92fc1 hot.m: Make colormap compatible with Matlab (bug #36473). Rik <rik@octave.org> parents: 15720 diff changeset	54
6964e6b92fc1 hot.m: Make colormap compatible with Matlab (bug #36473). Rik <rik@octave.org> parents: 15720 diff changeset	55 g = zeros (n, 1);
6964e6b92fc1 hot.m: Make colormap compatible with Matlab (bug #36473). Rik <rik@octave.org> parents: 15720 diff changeset	56 g(idx+1:2*idx, 1) = r(1:idx);
6964e6b92fc1 hot.m: Make colormap compatible with Matlab (bug #36473). Rik <rik@octave.org> parents: 15720 diff changeset	57 g(2*idx+1:end, 1) = 1;
6964e6b92fc1 hot.m: Make colormap compatible with Matlab (bug #36473). Rik <rik@octave.org> parents: 15720 diff changeset	58
16466 ac332eb727dd Simplify calculation of colormaps Rik <rik@octave.org> parents: 16366 diff changeset	59 idx = 2idx + 1; # approximately 3/4 n
16366 6964e6b92fc1 hot.m: Make colormap compatible with Matlab (bug #36473). Rik <rik@octave.org> parents: 15720 diff changeset	60 nel = n - idx + 1;
6964e6b92fc1 hot.m: Make colormap compatible with Matlab (bug #36473). Rik <rik@octave.org> parents: 15720 diff changeset	61
6964e6b92fc1 hot.m: Make colormap compatible with Matlab (bug #36473). Rik <rik@octave.org> parents: 15720 diff changeset	62 b = zeros (n, 1);
6964e6b92fc1 hot.m: Make colormap compatible with Matlab (bug #36473). Rik <rik@octave.org> parents: 15720 diff changeset	63 b(idx:end, 1) = [1:nel]' / nel;
6964e6b92fc1 hot.m: Make colormap compatible with Matlab (bug #36473). Rik <rik@octave.org> parents: 15720 diff changeset	64
6788 c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	65 map = [r, g, b];
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	66 else
14641 5f1d4def40e1 improve compatibility of colormap functions Carnë Draug <carandraug+dev@gmail.com> parents: 14640 diff changeset	67 map = zeros (0, 3);
6788 c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	68 endif
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	69
c81a0f3f5a82 [project @ 2007-07-23 22:05:29 by dbateman] dbateman parents: diff changeset	70 endfunction
9751 2b0cc0b6db61 Add demos for colormap functions Soren Hauberg <hauberg@gmail.com> parents: 9245 diff changeset	71
19867 9fc020886ae9 maint: Clean up m-files to follow Octave coding conventions. Rik <rik@octave.org> parents: 19731 diff changeset	72
9751 2b0cc0b6db61 Add demos for colormap functions Soren Hauberg <hauberg@gmail.com> parents: 9245 diff changeset	73 %!demo
2b0cc0b6db61 Add demos for colormap functions Soren Hauberg <hauberg@gmail.com> parents: 9245 diff changeset	74 %! ## Show the 'hot' colormap as an image
14237 11949c9795a0 Revamp %!demos in m-files to use Octave coding conventions on spacing, etc. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	75 %! image (1:64, linspace (0, 1, 64), repmat ((1:64)', 1, 64));
11949c9795a0 Revamp %!demos in m-files to use Octave coding conventions on spacing, etc. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	76 %! axis ([1, 64, 0, 1], "ticy", "xy");
11949c9795a0 Revamp %!demos in m-files to use Octave coding conventions on spacing, etc. Rik <octave@nomad.inbox5.com> parents: 14138 diff changeset	77 %! colormap (hot (64));
9751 2b0cc0b6db61 Add demos for colormap functions Soren Hauberg <hauberg@gmail.com> parents: 9245 diff changeset	78

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annotate scripts/image/hot.m @ 20595:c1a6c31ac29a