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## Copyright (C) 2011-2025 L. Markowsky <lmarkowsky@gmail.com>
##
## This file is part of the fuzzy-logic-toolkit.
##
## The fuzzy-logic-toolkit 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.
##
## The fuzzy-logic-toolkit 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 the fuzzy-logic-toolkit; see the file COPYING. If not,
## see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Function File} {@var{y} =} is_output_index (@var{x}, @var{fis})
##
## Return true if @var{x} is a valid output index for the given FIS structure,
## and return false otherwise. The FIS structure @var{fis} is assumed to be
## valid.
##
## @end deftypefn
## Author: L. Markowsky
## Keywords: fuzzy-logic-toolkit fuzzy private parameter-test
## Directory: fuzzy-logic-toolkit/inst/private/
## Filename: is_output_index.m
## Last-Modified: 10 Jun 2024
function y = is_output_index (x, fis)
y = is_pos_int (x) && (x <= columns (fis.output));
endfunction
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