[Bioperl-l] Errors generated from example code in HOW-TO sect ion

[Matthew Betts]

Whoops, thanks Simon, so it's just treating 'e-169' as zero... I guess it 
almost is, and hopefully nothing like 'e-2' ever appears in blast 
output...

Matt

On Fri, 1 Aug 2003, simon andrews (BI) wrote:

> 
> 
> > > Argument "e-171" isn't numeric in numeric lt (<) at 
> > > blasttoimg.pl line 49, 
> 
> > From: Matthew Betts [mailto:Matthew.Betts at ii.uib.no]
> >
> > I recently ran up against the same warning, but was happy to 
> > see that perl  did the comparison correctly anyway
> 
> Oh but it didn't!  Try this, then change $num to be 1e-169.  Perl guesses, and gets it wrong.
> 
> #!/usr/bin/perl -w
> use strict;
> 
> my $num = 'e-169';
> 
> $num += 0;
> 
> print "Number is $num\n";
> 
> if ($num == 1e-169) {
>   print "OK they match\n";
> }
> 
> else {
>   print "Oops, no match\n";
> }
> 

-- 
Matthew Betts, mailto:matthew.betts at ii.uib.no
Phone: (+47) 55 58 40 22
CBU, BCCS, UNIFOB / Universitetet i Bergen
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