Re: [SLUG] Command help

From: Ian Blenke (icblenke@nks.net)
Date: Sun Feb 12 2006 - 15:23:42 EST

Bob Stia wrote:
> Hello Sluggers,
>
> What is wrong with the following command? Trying to figure out how much to
> shrink down a movie.m2v Not a bash command?
>
> EasyStreet:/backup # factor = (6423971301/ (4600000000. - 232415232 ) ) * 1.04
> bash: syntax error near unexpected token `('
> EasyStreet:/backup #
>

If you have integers (not floats), you can do the following:

    #!/bin/bash
    (( factor = 6423971301/ (4600000000 - 232415232 ) ))
    echo $factor

There's probably another way to handle floats, but this is what I'd
probably end up doing:

    factor=$( echo 'scale=2; (6423971301/ (4600000000. - 232415232 ) ) *
1.04' | bc )

Using bc is a bit of cheating, but it's quick and dirty, and it works.

The "scale=2" means that you want two places to the right of the decimal. 

-- 
- Ian C. Blenke <icblenke@nks.net>
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