Re^2: Add numbers in log domain

[BrowserUk]

in reply to Re: Add numbers in log domain
in thread Add numbers in log domain [solved]

Spot on! (Though you do need to know the arbitrary base B):

sub log2p5{ log( $_[0] ) / log( 2.5 ) };;

$X = log2p5( 10 ); 
$Y = log2p5( 15 ); 
$Z = log2p5( 10 + 15 ); 
print $X, $Y, $Z;;
2.51294159473206 2.95544864408182 3.51294159473206

print 2.51294159473206 + log2p5( 1 + 2.5**( 2.95544864408182 - 2.51294
[phone] ) );;
3.51294159473206

[salva]

yes, but it is easy to convert from any base to natural, perform the computation and then convert back to the original base.