blob: a2791835618f28d96031b7dbfc26ccafd06fb351 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
|
// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) INRIA
//
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution. The terms
// are also available at
// http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
function x=coshm(a)
// hyperbolic cosine of square matrix x
rhs = argn(2);
if rhs <> 1 then
error(msprintf(gettext("%s: Wrong number of input argument(s): %d expected.\n"),"coshm",1));
end
if type(a)<>1 then
error(msprintf(gettext("%s: Wrong type for input argument #%d: Real or complex matrix expected.\n"),"coshm",1));
end
[m,n]=size(a)
if m<>n then
error(msprintf(gettext("%s: Wrong size for input argument #%d: A square matrix expected.\n"),"coshm",1));
end
if a==[] then
x=[];
return;
end
x=(expm(a)+expm(-a))/2;
endfunction
|
