File: wwpowe.f

package info (click to toggle)
scilab 4.0-12
  • links: PTS
  • area: non-free
  • in suites: etch, etch-m68k
  • size: 100,640 kB
  • ctags: 57,333
  • sloc: ansic: 377,889; fortran: 242,862; xml: 179,819; tcl: 42,062; sh: 10,593; ml: 9,441; makefile: 4,377; cpp: 1,354; java: 621; csh: 260; yacc: 247; perl: 130; lex: 126; asm: 72; lisp: 30
file content (44 lines) | stat: -rw-r--r-- 1,108 bytes parent folder | download | duplicates (2) 
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
36
37
38
39
40
41
42
43
44
 
      subroutine wwpowe(vr,vi,pr,pi,rr,ri,ierr)
c!purpose
c     computes v^p with v complex and p complex
c!calling sequence 
c     subroutine wdpowe(vr,vi,p,rr,ri,ierr)
c     integer ierr
c     double precision vr,vi,pr,pi,rr,ri
c     vr   : real part of v
c     vi   : imaginary part of v
c     pr   : real part of p
c     pi   : imaginary part of p
c     rr   : result's real part
c     ri   : result's imaginary part
c     ierr : error flag
c            ierr=0 if ok
c            ierr=1 if 0**0
c            ierr=2 if  0**k with k<0
c!origin
c Serge Steer INRIA 1996
c!
c     Copyright INRIA
      integer ierr
      double precision vr,vi,pr,pi,sr,si,rr,ri,infinity
c
      ierr=0
c     
      if(pi.eq.0.0d+0) then
         call wdpowe(vr,vi,pr,rr,ri,ierr)
      else
         if(abs(vr)+abs(vi).ne.0.0d+0) then
            call wlog(vr,vi,sr,si)
            call wmul(sr,si,pr,pi,sr,si)
            sr=exp(sr)
            rr=sr*cos(si)
            ri=sr*sin(si)
         else
            ri=0.0d0
            rr=infinity(ri)
            ierr=2
         endif
      endif
c     
      return
      end