Mercurial > octave-nkf

annotate scripts/elfun/sech.m @ 2303:5cffc4b8de57

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
[project @ 1996-06-24 09:15:24 by jwe]
author jwe
date Mon, 24 Jun 1996 09:15:24 +0000
parents 79ee7f07221e
children 2b5788792cad
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2303
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
1 ### Copyright (C) 1996 John W. Eaton
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
2 ###
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
3 ### This file is part of Octave.
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
4 ###
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
5 ### Octave is free software; you can redistribute it and/or modify it
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
6 ### under the terms of the GNU General Public License as published by
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
7 ### the Free Software Foundation; either version 2, or (at your option)
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
8 ### any later version.
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
9 ###
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
10 ### Octave is distributed in the hope that it will be useful, but
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
11 ### WITHOUT ANY WARRANTY; without even the implied warranty of
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
12 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
13 ### General Public License for more details.
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
14 ###
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
15 ### You should have received a copy of the GNU General Public License
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
16 ### along with Octave; see the file COPYING. If not, write to the Free
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
17 ### Software Foundation, 59 Temple Place - Suite 330, Boston, MA
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
18 ### 02111-1307, USA.
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
19
713
632844972d35 [project @ 1994-09-20 18:37:13 by jwe]
jwe
parents:
diff changeset
20 function w = sech (z)
632844972d35 [project @ 1994-09-20 18:37:13 by jwe]
jwe
parents:
diff changeset
21
2303
5cffc4b8de57 [project @ 1996-06-24 09:15:24 by jwe]
jwe
parents: 1133
diff changeset
22 ## sech (z): compute the hyperbolic secant for each element of z.
713
632844972d35 [project @ 1994-09-20 18:37:13 by jwe]
jwe
parents:
diff changeset
23
632844972d35 [project @ 1994-09-20 18:37:13 by jwe]
jwe
parents:
diff changeset
24 if (nargin != 1)
904
3470f1e25a79 [project @ 1994-11-09 21:22:15 by jwe]
jwe
parents: 713
diff changeset
25 usage ("sech (z)");
713
632844972d35 [project @ 1994-09-20 18:37:13 by jwe]
jwe
parents:
diff changeset
26 endif
632844972d35 [project @ 1994-09-20 18:37:13 by jwe]
jwe
parents:
diff changeset
27
1095
06a495f515c2 [project @ 1995-02-09 14:45:55 by jwe]
jwe
parents: 904
diff changeset
28 w = 1 ./ cosh(z);
713
632844972d35 [project @ 1994-09-20 18:37:13 by jwe]
jwe
parents:
diff changeset
29
1133
79ee7f07221e [project @ 1995-02-22 22:16:41 by jwe]
jwe
parents: 1095
diff changeset
30 endfunction