Re: [Bug-datamash] Rounding

[Assaf Gordon]

Hello,

On 07/03/2015 12:02 AM, Timothy Rice wrote:
> The thought crossed my mind that it would be good to have operations for
> rounding and taking the floor or ceiling of numbers. Would there be
> interest in this? Are there any gotchas that would need to be kept in mind
> if it were implemented?

Interesting idea.

If I understand correctly, you intend this to be performed on every line 
(without grouping) ?
Such as:

    $ printf "1.4\n2.7\n" | datamash round 1 floor 1 ceil 1
    1    1    2
    3    2    3

I would intuitively think this is a job more suitable for awk,
however it seems that awk (at least gawk) requires a large helper function:
   https://www.gnu.org/software/gawk/manual/html_node/Round-Function.html

Would you think there's a need to round off to specific number of digits (e.g not 
always to integers, but round 2.459 => 2.46 ) ?

thanks,
 - assaf