From: Robert Klemme <shortcutter@...>
Date: 2008-10-23T21:02:31+09:00
Subject: Re: i need to represent data as percentages

2008/10/23 Brian Candler <b.candler@pobox.com>:
> Tim Hunter wrote:
>> irb(main):008:0> x = 0.86899
>> => 0.86899
>> irb(main):009:0> "%2d%%" % (x * 100.0)
>> => "86%"
>> irb(main):010:0>
>
> Or better, if you want round-to-nearest:
>
> irb(main):009:0> "%2.0f%%" % (x * 100)
> => "87%"
> irb(main):010:0> "%2.1f%%" % (x * 100)
> => "86.9%"
> irb(main):011:0> "%2.2f%%" % (x * 100)
> => "86.90%"
> irb(main):012:0> "%2.3f%%" % (x * 100)
> => "86.899%"

In that case you can do  "%.1f%%" % (x * 100), i.e. you do not need
the number before the dot.  This number is for fixing the length of
the whole expression:

irb(main):001:0> "%.2f" % 1.2345
=> "1.23"
irb(main):002:0> "%10.2f" % 1.2345
=> "      1.23"
irb(main):003:0> "%1.2f" % 1.2345
=> "1.23"
irb(main):004:0> "%0.2f" % 1.2345
=> "1.23"
irb(main):005:0> "%5.2f" % 1.2345
=> " 1.23"

Kind regards

robert

-- 
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