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########################################################################
##
## Copyright (C) 2000-2024 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 {} {} semilogxerr (@var{y}, @var{ey})
## @deftypefnx {} {} semilogxerr (@var{y}, @dots{}, @var{fmt})
## @deftypefnx {} {} semilogxerr (@var{x}, @var{y}, @var{ey})
## @deftypefnx {} {} semilogxerr (@var{x}, @var{y}, @var{err}, @var{fmt})
## @deftypefnx {} {} semilogxerr (@var{x}, @var{y}, @var{lerr}, @var{uerr}, @var{fmt})
## @deftypefnx {} {} semilogxerr (@var{x}, @var{y}, @var{ex}, @var{ey}, @var{fmt})
## @deftypefnx {} {} semilogxerr (@var{x}, @var{y}, @var{lx}, @var{ux}, @var{ly}, @var{uy}, @var{fmt})
## @deftypefnx {} {} semilogxerr (@var{x1}, @var{y1}, @dots{}, @var{fmt}, @var{xn}, @var{yn}, @dots{})
## @deftypefnx {} {} semilogxerr (@var{hax}, @dots{})
## @deftypefnx {} {@var{h} =} semilogxerr (@dots{})
## Produce 2-D plots using a logarithmic scale for the x-axis and errorbars
## at each data point.
##
## Many different combinations of arguments are possible. The most common
## form is
##
## @example
## semilogxerr (@var{x}, @var{y}, @var{ey}, @var{fmt})
## @end example
##
## @noindent
## which produces a semi-logarithmic plot of @var{y} versus @var{x}
## with errors in the @var{y}-scale defined by @var{ey} and the plot
## format defined by @var{fmt}. @xref{XREFerrorbar,,@code{errorbar}}, for
## available formats and additional information.
##
## If the first argument @var{hax} is an axes handle, then plot into this axes,
## rather than the current axes returned by @code{gca}.
##
## @seealso{errorbar, semilogyerr, loglogerr}
## @end deftypefn
function h = semilogxerr (varargin)
[hax, varargin] = __plt_get_axis_arg__ ("semilogxerr", varargin{:});
oldfig = [];
if (! isempty (hax))
oldfig = get (0, "currentfigure");
endif
unwind_protect
hax = newplot (hax);
set (hax, "xscale", "log");
if (! ishold ())
set (hax, "xminortick", "on");
endif
htmp = __errplot__ ("semilogxerr", hax, varargin{:});
unwind_protect_cleanup
if (! isempty (oldfig))
set (0, "currentfigure", oldfig);
endif
end_unwind_protect
if (nargout > 0)
h = htmp;
endif
endfunction
%!demo
%! clf;
%! x = exp (log (0.01):0.2:log (10));
%! wblpdf = @(x, scl, shp) shp*(scl^-shp) .* x.^(shp-1) .* exp (-(x/scl).^shp);
%! y = wblpdf (x, 2, 2);
%! ey = 0.5*rand (size (y)) .* y;
%! semilogxerr (x, y, ey, "#~x-");
%! xlim (x([1, end]));
%! title ({"semilogxerr(): semilogx() plot with errorbars", ...
%! "X-axis is logarithmic"});
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