|
3200
|
1 ## Copyright (C) 1995, 1996, 1997 Kurt Hornik |
|
3426
|
2 ## |
|
3200
|
3 ## This program is free software; you can redistribute it and/or modify |
|
|
4 ## it under the terms of the GNU General Public License as published by |
|
|
5 ## the Free Software Foundation; either version 2, or (at your option) |
|
|
6 ## any later version. |
|
3426
|
7 ## |
|
3200
|
8 ## This program is distributed in the hope that it will be useful, but |
|
|
9 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
|
|
10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|
3426
|
11 ## General Public License for more details. |
|
|
12 ## |
|
3200
|
13 ## You should have received a copy of the GNU General Public License |
|
|
14 ## along with this file. If not, write to the Free Software Foundation, |
|
|
15 ## 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
|
|
16 |
|
|
17 ## usage: iqr (x) |
|
|
18 ## |
|
|
19 ## If x is a vector, return the interquartile range, i.e., the |
|
|
20 ## difference between the upper and lower quartile, of the input data. |
|
|
21 ## |
|
|
22 ## If x is a matrix, do the above for each column of x. |
|
3426
|
23 |
|
3200
|
24 ## Author KH <Kurt.Hornik@ci.tuwien.ac.at> |
|
|
25 ## Description: Interquartile range |
|
|
26 |
|
|
27 function y = iqr (x) |
|
3426
|
28 |
|
3200
|
29 if (nargin != 1) |
|
|
30 usage ("iqr (x)"); |
|
|
31 endif |
|
|
32 |
|
|
33 y = empirical_inv (3/4, x) - empirical_inv (1/4, x); |
|
3426
|
34 |
|
3200
|
35 endfunction |
