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- ## Copyright (C) 1995, 1996, 1997 Kurt Hornik
- ##
- ## 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.
- ##
- ## You should have received a copy of the GNU General Public License
- ## along with this file. If not, write to the Free Software Foundation,
- ## 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- ## usage: iqr (x)
- ##
- ## If x is a vector, return the interquartile range, i.e., the
- ## difference between the upper and lower quartile, of the input data.
- ##
- ## If x is a matrix, do the above for each column of x.
-
- ## Author KH <Kurt.Hornik@ci.tuwien.ac.at>
- ## Description: Interquartile range
-
- function y = iqr (x)
-
- if (nargin != 1)
- usage ("iqr (x)");
- endif
-
- y = empirical_inv (3/4, x) - empirical_inv (1/4, x);
-
- endfunction
-