In addition to my previous quote, I don't understand the user of
fromIntegral
At the prelude, when i type i.e. fromIntegral 4 it returns 4
Thanks
From: Sebastian Sylvan <[EMAIL PROTECTED]>
Reply-To: [EMAIL PROTECTED]
To: Chatzianastassiou Achilleas <[EMAIL PROTECTED]>
CC: [email protected]
Subject: Re: [Haskell-cafe] round function
Date: Sun, 12 Feb 2006 22:23:17 +0100
On 2/12/06, Chatzianastassiou Achilleas <[EMAIL PROTECTED]>
wrote:
> Hi all,
>
> I am trying to implement a function that finds the significant figure of
a
> number to a specified point i.e. 2.55555 3 = 2.556. I have implemented
> something like:
>
> sig :: (RealFrac a, Integral b) => a -> Int -> a
> sig x y = round y
>
> However this doesn't work. Moreover at the Prelude when i type round
2.3333
> 2 i get an error.
> Any suggestions?
>
Something like:
myround n s = fromIntegral (round (n * factor)) / factor
where factor = fromIntegral (10^s)
Basically scaling it to bring the specified number of digits to the
left of the decimal point, then rounding, then scaling back.
/S
--
Sebastian Sylvan
+46(0)736-818655
UIN: 44640862
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