Mercurial > octave-nkf
view examples/code/fortransub.f @ 20643:d6d04088ac9e
nbininv.m: Increase speed (85X) and accuracy of function (bug #34363).
* nbininv.m: Call new function scalar_nbininv to calculate nbininv for scalar.
If there are still uncalculated values then call bin_search_nbininv. Call
bin_search_nbininv directly for vectors. Add more BIST tests.
* nbininv.m (scalar_binoinv): New subfunction to calculate nbininv for scalar x.
Stops when x > 1000.
* nbininv.m (bin_search_nbininv): New subfunction to do binary search for nbininv.
author | Lachlan Andrew <lachlanbis@gmail.com> |
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date | Sun, 11 Oct 2015 20:33:37 -0700 |
parents | c8240a60dd01 |
children |
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subroutine fortransub (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 ('fortransub: 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 ('fortransub: error writing string') endif return end