Re: Float/double to hex?

Like the other monks, I’m not clear on the question being asked here. However, if floating point numbers in hexadecimal notation are wanted, Data::Float may be what you’re looking for:

#! perl
use strict;
use warnings;
use Data::Float qw( float_hex hex_float );

my $n = 1 / 7;
my $h = float_hex($n);
my $d = hex_float($h);

print "fraction =    $n\nhex      = $h\ndecimal  =    $d\n";
[download]

Output:

14:46 >perl 538_SoPW.pl
fraction =    0.142857142857143
hex      = +0x1.2492492492492p-3
decimal  =    0.142857142857143

14:47 >
[download]

Hope that helps,

Athanasius <°(((>< contra mundum Iustus alius egestas vitae, eros Piratica,

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Re^2: Float/double to hex? by Anonymous Monk on Feb 19, 2013 at 19:53 UTC
I want to do some text analysis of stock data. I cannot do what I want using numbers, only alpha or hex. I want to convert the numbers to the four byte hex representation of a float (or eight bytes for a double). I didn't think to check CPAN. I'll try the above code. Thanks to all that replied. Mike	[reply]
Re^3: Float/double to hex? by Anonymous Monk on Feb 19, 2013 at 21:18 UTC
I know a float is a four byte value. I want to have the hex string representation of those four bytes. If (2**16) is 65536, I want 65536 to be 0x0000ffff (or 0xffff0000, whatever order). Mike	[reply]
Re^4: Float/double to hex? by edwyr (Sexton) on Feb 19, 2013 at 22:03 UTC
Here is what I am looking for (running inside "perl -d -e 1"): x 2*16 65536 x unpack('h', pack('i', 65535)) 'ffff0000' $x = 1 / 7 x $x 0.142857142857143 x unpack('h*', pack('f', $x)) '529421e3'	[reply]