File: atanh.sci

package info (click to toggle)
scilab 2.4-1
  • links: PTS
  • area: non-free
  • in suites: potato, slink
  • size: 55,196 kB
  • ctags: 38,019
  • sloc: ansic: 231,970; fortran: 148,976; tcl: 7,099; makefile: 4,585; sh: 2,978; csh: 154; cpp: 101; asm: 39; sed: 5
file content (13 lines) | stat: -rw-r--r-- 386 bytes parent folder | download | duplicates (2) 
1
2
3
4
5
6
7
8
9
10
11
12
13
 
function t=atanh(x)
//Element wise Hyperbolic tangent inverse 
//Entries of x must be in ]-1,1[
//Entries of T are in          ] inf,inf[ x ]-pi/2,pi/2[
//                             ]-inf, 0 [ x [-pi/2]
//                      and    ]  0 ,inf[ x [pi/2]
//!
// Copyright INRIA
if type(x)<>1 then error(53),end
[m,n]=size(x)
t=log((ones(m,n)+x).*sqrt(ones(m,n)./(ones(m,n)-(x.*x))))