isscalar.m

JAVA 数学程序库 提供常规的数值计算程序包

## Copyright (C) 1996, 1997 John W. Eaton
##
## 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 2, 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, write to the Free
## Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
## 02110-1301, USA.

## -*- texinfo -*-
## @deftypefn {Function File} {} isscalar (@var{a})
## Return 1 if @var{a} is a scalar.  Otherwise, return 0.
## @seealso{size, rows, columns, length, isscalar, ismatrix}
## @end deftypefn

## Author: jwe

function retval = isscalar (x)

  if (nargin == 1)
    retval = prod (size (x)) == 1;
  else
    usage ("isscalar (x)");
  endif

endfunction

/*
@GROUP
general
@SYNTAX
isscalar(values)
@DOC
.
@EXAMPLES
<programlisting>
ismatrix([88]) 
isnumeric([55, 66])
</programlisting>
@NOTES
.
@SEE
ischar, iscell, isnumeric, ismatrix, isprime
*/