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maint: Update copyright notices for release.
author John W. Eaton <jwe@octave.org>
date Wed, 23 Oct 2013 22:09:27 -0400
parents 7bb76a22cde1
children 4197fc428c7d
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1 ## Copyright (C) 1993-2013 John W. Eaton
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {} loglog (@var{y})
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21 ## @deftypefnx {Function File} {} loglog (@var{x}, @var{y})
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22 ## @deftypefnx {Function File} {} loglog (@var{x}, @var{y}, @var{prop}, @var{value}, @dots{})
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23 ## @deftypefnx {Function File} {} loglog (@var{x}, @var{y}, @var{fmt})
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24 ## @deftypefnx {Function File} {} loglog (@var{hax}, @dots{})
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25 ## @deftypefnx {Function File} {@var{h} =} loglog (@dots{})
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26 ## Produce a 2-D plot using logarithmic scales for both axes.
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27 ##
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28 ## See the documentation of @code{plot} for a description of the arguments
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29 ## that @code{loglog} will accept.
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30 ##
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31 ## If the first argument @var{hax} is an axes handle, then plot into this axis,
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32 ## rather than the current axes returned by @code{gca}.
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33 ##
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34 ## The optional return value @var{h} is a graphics handle to the created plot.
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35 ## @seealso{plot, semilogx, semilogy}
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36 ## @end deftypefn
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37
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38 ## Author: jwe
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39
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40 function h = loglog (varargin)
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42 [hax, varargin, nargs] = __plt_get_axis_arg__ ("loglog", varargin{:});
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43
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44 if (nargs < 1)
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45 print_usage ();
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46 endif
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47
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48 oldfig = [];
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49 if (! isempty (hax))
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50 oldfig = get (0, "currentfigure");
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51 endif
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52 unwind_protect
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53 hax = newplot (hax);
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54
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55 set (hax, "xscale", "log", "yscale", "log");
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56 if (! ishold (hax))
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57 set (hax, "xminortick", "on", "yminortick", "on");
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58 endif
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60 htmp = __plt__ ("loglog", hax, varargin{:});
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62 unwind_protect_cleanup
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63 if (! isempty (oldfig))
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64 set (0, "currentfigure", oldfig);
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65 endif
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66 end_unwind_protect
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68 if (nargout > 0)
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69 h = htmp;
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70 endif
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71
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72 endfunction
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75 %!demo
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76 %! clf;
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77 %! t = 1:0.01:10;
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78 %! x = sort ((t .* (1 + rand (size (t)))) .^ 2);
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79 %! y = (t .* (1 + rand (size (t)))) .^ 2;
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80 %! loglog (x, y);
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81 %! title ({'loglog() plot', 'Both axes are logarithmic'});
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82
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83 %!demo
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84 %! clf;
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85 %! a = logspace (-5, 1, 10);
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86 %! b =-logspace (-5, 1, 10);
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87 %!
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88 %! subplot (1,2,1);
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89 %! loglog (a, b);
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90 %! xlabel ('loglog (a, b)');
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91 %!
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92 %! subplot (1,2,2);
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93 %! loglog (a, abs (b));
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94 %! set (gca, 'ydir', 'reverse');
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95 %! xlabel ('loglog (a, abs (b))');
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96
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97 %!test
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98 %! hf = figure ("visible", "off");
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99 %! unwind_protect
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100 %! a = logspace (-5, 1, 10);
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101 %! b = logspace (-5, 1, 10);
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102 %! loglog (a, b);
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103 %! assert (get (gca, "yscale"), "log");
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104 %! assert (get (gca, "xscale"), "log");
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105 %! unwind_protect_cleanup
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106 %! close (hf);
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107 %! end_unwind_protect
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108
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109 %!test
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110 %! hf = figure ("visible", "off");
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111 %! unwind_protect
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112 %! a = logspace (-5, 1, 10);
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113 %! b =-logspace (-5, 1, 10);
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114 %! loglog (a, b);
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115 %! axis tight;
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116 %! assert (all (get (gca, "ytick") < 0));
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117 %! unwind_protect_cleanup
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118 %! close (hf);
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119 %! end_unwind_protect
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120