Mercurial > hg > octave-lyh

comparison scripts/general/diff.m @ 3369:f37ca3017116

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
[project @ 1999-11-21 16:26:02 by jwe]
author jwe
date Sun, 21 Nov 1999 16:26:08 +0000
parents 1dca28c213f0
children f8dde1807dee
comparison
equal deleted inserted replaced
3368:a4cd1e9d9962 3369:f37ca3017116
12 ## 12 ##
13 ## You should have received a copy of the GNU General Public License 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, 14 ## along with this file. If not, write to the Free Software Foundation,
15 ## 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 15 ## 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
16 16
17 ## usage: diff (x [, k]) 17 ## -*- texinfo -*-
18 ## 18 ## @deftypefn {Function File} {} diff (@var{x}, @var{k})
19 ## If x is a vector of length n, diff (x) is the vector of first 19 ## If @var{x} is a vector of length @var{n}, @code{diff (@var{x})} is the
20 ## differences x(2) - x(1), ..., x(n) - x(n-1). 20 ## vector of first differences
21 ## 21 ## @iftex
22 ## If x is a matrix, diff (x) is the matrix of column differences. 22 ## @tex
23 ## diff (x, k), where k is a nonnegative integer, returns the k-th 23 ## $x_2 - x_1, \ldots{}, x_n - x_{n-1}$.
24 ## @end tex
25 ## @end iftex
26 ## @ifinfo
27 ## @var{x}(2) - @var{x}(1), @dots{}, @var{x}(n) - @var{x}(n-1).
28 ## @end ifinfo
29 ##
30 ## If @var{x} is a matrix, @code{diff (@var{x})} is the matrix of column
24 ## differences. 31 ## differences.
32 ##
33 ## The second argument is optional. If supplied, @code{diff (@var{x},
34 ## @var{k})}, where @var{k} is a nonnegative integer, returns the
35 ## @var{k}-th differences.
36 ## @end deftypefn
25 37
26 ## Author: KH <Kurt.Hornik@ci.tuwien.ac.at> 38 ## Author: KH <Kurt.Hornik@ci.tuwien.ac.at>
27 ## Created: 2 February 1995 39 ## Created: 2 February 1995
28 ## Adapted-By: jwe 40 ## Adapted-By: jwe
29 41