☜ | ## $%LOG## M[UMPS] by Example | ☞ |

2-Jul–96, 6:54:35 Routine Save for General Mathematics Library function $%LOG^MATH ; ; Unless otherwise noted, the code below ; was approved in document X11/95–11 ; ; If corrections have been applied, ; first the original line appears, ; with three semicolons at the beginning of the line. ; ; Then the source of the correction is acknowledged, ; then the corrected line appears, followed by a ; line containing three semicolons. ; LOG(X,PREC) ; New L,LIM,M,N,K,VALUE If X'>0 Set $Ecode=",M28," Set PREC=$Get(PREC,11) Set M=1 ; ;;; If X>0 For N=0:1 Quit:(X/M)<10 Set M=M*10 ; Winfried Gerum (8 June 1995) For N=0:1 Quit:(X/M)<10 Set M=M*10 ;;; ; If X<1 For N=0:–1 Quit:(X/M)>0.1 Set M=M*0.1 Set X=X/M Set X=(X–1)/(X+1),(VALUE,L)=X Set LIM=$Select((PREC+3)'>11:PREC+3,1:11),@("LIM=1E-"_LIM) For K=3:2 Set L=L*X*X,M=L/K,VALUE=M+VALUE Set:M<0 M=-M Quit:M<LIM Set VALUE=VALUE*2+(N*2.30258509298749) Quit VALUE ;=== ; ; ;

Copyright © Standard Documents; 1977-2022 MUMPS Development Committee;

Copyright © Examples: 1995-2022 Ed de Moel;

Copyright © Annotations: 2003-2008 Jacquard Systems Research

Copyright © Annotations: 2008-2022 Ed de Moel.

*The information in this page is
NOT authoritative and subject to be modified
at any moment.Please consult the
appropriate (draft) language standard for an
authoritative definition.*

*Some specifications are "approved
for inclusion in a future standard". Note
that the MUMPS Development Committee cannot
guarantee that such future standards will
indeed be published.*

This page most recently updated on 30-Nov-2011, 20:04:37 .

For comments, contact Ed de Moel (demoel@jacquardsystems.com)