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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_io_vector (@var{x})
##
## Return 1 if @var{x} is a vector of FIS input/output variable structures,
## and return 0 otherwise.
##
## is_io_vector is a private function that localizes the test for valid FIS
## structure members 'input' and 'output'.
##
## @end deftypefn
## Author: L. Markowsky
## Keywords: fuzzy-logic-toolkit fuzzy private parameter-test
## Directory: fuzzy-logic-toolkit/inst/private/
## Filename: is_io_vector.m
## Last-Modified: 20 Aug 2012
function y = is_io_vector (x)
y = 1;
if (isequal(x, []))
y = 1;
elseif (!isvector(x))
y = 0;
else
y = 1;
for i = 1 : length (x)
if (!is_io_struct (x(i)))
y = 0;
endif
endfor
endif
endfunction
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