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doc: Better explain which complex result is chosen by .^ * expr.txi: Explain which complex root is chosen and how to choose a real one if preferred. * data.cc (power): Ditto. * help.cc (.^, .**): Ditto. (^, **): Suggest using real-valued functions.
author Jordi Gutiérrez Hermoso <jordigh@octave.org>
date Sun, 08 Jan 2012 15:24:53 -0500
parents 4295d634797d
children
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      subroutine fortsub (n, a, s)
      implicit none
      character*(*) s
      real*8 a(*)
      integer*4 i, n, ioerr
      do i = 1, n
        if (a(i) .eq. 0d0) then
          call xstopx ('fortsub: divide by zero')
        else
          a(i) = 1d0 / a(i)
        endif
      enddo
      write (unit = s, fmt = '(a,i3,a,a)', iostat = ioerr)
     $       'There are ', n,
     $       ' values in the input vector', char(0)
      if (ioerr .ne. 0) then
        call xstopx ('fortsub: error writing string')
      endif
      return
      end