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- # Copyright (C) 1993, 1994, 1995 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, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- function retval = mean (a)
-
- # usage: mean (a)
- #
- # For vector arguments, return the mean the values.
- #
- # For matrix arguments, return a row vector containing the mean for
- # each column.
- #
- # See also: median, std
-
- if (nargin != 1)
- usage ("mean (a)");
- endif
-
- [nr, nc] = size (a);
- if (nr == 1 || nc == 1)
- retval = sum (a) / length (a);
- elseif (nr > 0 && nc > 0)
- retval = sum (a) / nr;
- else
- error ("mean: invalid matrix argument");
- endif
-
- endfunction
-