offtopic? Math::BigFloat

[C. Abney]

~sdpm~

Well, not to answer my own question, but this is what I got out of the
module documentation itself (perl v5.8, from RH8.0, and elsewhere):

 $x‐>blog($base);            # logarithm of $x, base defaults to e
                             # (other bases than e not supported yet)

But at Perldoc.com it simply says that function is not implemented, yet.

So, looks like I get to play with Taylor Series. :-/

Yours,

CA

On Fri, 2002-12-13 at 10:51, CA wrote:
> ~sdpm~
> I'm probably using the module incorrectly, but it seems no matter what I
> do with ->accuracy() and ->precision() I get this whack response from
> the module:
> 
> ====<tbf.pl>====
> #! /usr/bin/perl -w
> # 20021023CAbney
> # $Id$
> 
> use strict;
> use Carp;
> use Math::BigFloat;
> 
> my ( $N, $B );
> 
> $N = Math::BigFloat->new( 1.0E-155 );
> $B = Math::BigFloat->new( "0.004" );
> 
> print "ln(N) = ", $N->blog(), "\n";
> print "ln(B) = ", $B->blog(), "\n";
> ====<tbf.pl>====
> 
> The above prints out:
> 
> ====
> ln(N) = -2
> ln(B) = -1.984063745019920318725099601593625498008
> ====
> 
> Which is just wrong.  I'm dredging through the module code for clues,
> but so far have had no luck.  It professes to use Taylor Series but lots
> o code has been commented out and stuff, and someone was struggling with
> oo concepts when it was written :)
> 
> Can anyone show me what I'm doing wrong if it's not a bug?
> 
> Yours,
> 
> CA
> 
> ~sdpm~
> 
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-- 
Charles Abney
Polymorphism Research Laboratory, 0603
UCSD School of Medicine
9500 Gilman Dr.
La Jolla, CA 92093-0603
~sdpm~

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