/usr/share/plplot_octave/ishold.m is in octave-plplot 5.13.0+dfsg-6ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | ## Copyright (C) 2007 Andrew Ross.
##
## This program 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 2, or (at your option)
## any later version.
##
## This program 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.
##
## This file is part of plplot_octave.
## usage: ishold
##
## Return 1 if the next line will be added to the current plot, or 0 if
## the plot device will be cleared before drawing the next line.
##
function a = ishold()
global __pl
a = __pl.hold(plgstrm+1);
endfunction
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