Re: Converting percentage into number

Assuming that your percent-values are always preceded by whitespace, and is always a valid numeric, the following should cope with values with and without decimal places:

s/(\S+)%/$1*0.01/eg #e = evaluate right-side as expression, g = global
+, i.e. change all percent-values found, not just the first
[download]

map{$a=1-$_/10;map{$d=$a;$e=$b=$_/20-2;map{($d,$e)=(2*$d*$e+$a,$e**2
-$d**2+$b);$c=$d**2+$e**2>4?$d=8:_}1..50;print$c}0..59;print$/}0..20
[download]

Tom Melly, pm@tomandlu.co.uk

Comment on Re: Converting percentage into number Select or Download Code

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Re^2: Converting percentage into number by Tanktalus (Canon) on Jan 10, 2007 at 15:37 UTC
If you're going to worry about with and without decimal places (++ for that), try: `#!/usr/bin/perl use strict; use warnings; use Regexp::Common; while (<DATA>) { s\|($RE{num}{decimal})%\|$1 * 0.01\|eg; print; } __DATA__ ENSP00000233379 1058 30 1206 1298 96.1% 13 + 96524483 96533474 8992 ENSP00000233379 1058 30 1206 1298 96% 13 + 96524483 96533474 8992` [download] Ok, so you have to go install Regexp::Common. Getting this right every time is well worth that minor expense, IMO. Otherwise, if somehow the data gets corrupted so there is, say, "S%" in there somewhere, your code will generate an error. To take care of "S6%", just add a \b: `s\|\b($RE{num}{decimal})%\|$1 * 0.01\|eg;` [download] It will leave the corruption alone this way. Detecting the corruption is as simple as checking if there are remaining %'s after the substitution: `if (/%/) { print STDERR "Input has been corrupted!"; # die ? }` [download] Ok, maybe I'm going beyond the original post's scope here... ;-)	[reply] [d/l] [select]

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Re^2: Converting percentage into number
by Tanktalus (Canon) on Jan 10, 2007 at 15:37 UTC

If you're going to worry about with and without decimal places (++ for that), try:

#!/usr/bin/perl

use strict;
use warnings;

use Regexp::Common;

while (<DATA>) {
    s|($RE{num}{decimal})%|$1 * 0.01|eg;
    print;
}

__DATA__
ENSP00000233379 1058 30 1206 1298 96.1% 13 + 96524483 96533474 8992
ENSP00000233379 1058 30 1206 1298 96% 13 + 96524483 96533474 8992
[download]

Regexp::Common

    s|\b($RE{num}{decimal})%|$1 * 0.01|eg;
[download]

    if (/%/) {
       print STDERR "Input has been corrupted!";
       # die ?
    }
[download]

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