On Tue, 6 Apr 2010, JustinNabble wrote:
Likewise, identical( (4.1 * 100 ) %/% 1 , 409 ) returns TRUE on my computer,
so the result is off by exactly 1, too larger to be explained by floating
point error.
The result of (4.1 * 100 ) %/% 1 is an integer, so if it doesn't agree exactly
it has to
Hi,
On Tue, Apr 6, 2010 at 5:26 PM, JustinNabble wrote:
>
> Thanks for the response. I read through the Inferno and there's a lot of
> useful stuff in there. However I think you may have missed something.
>
> Having some experience with other languages, I know that floating point
> numbers aren't
(4.1*100) %/% 1
[1] 409
?"%/%"
Bert Gunter
Genentech Nonclinical Statistics
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf Of JustinNabble
Sent: Tuesday, April 06, 2010 2:27 PM
To: r-help@r-project.org
Subject: Re: [R] Odd r
Thanks for the response. I read through the Inferno and there's a lot of
useful stuff in there. However I think you may have missed something.
Having some experience with other languages, I know that floating point
numbers aren't represented exactly, the issue is that R is off by much more
than w
FAQ 7.31
Follow the link to what you should know about floating point numbers.
On Fri, Mar 26, 2010 at 5:05 PM, JustinNabble wrote:
>
> Can anyone explain this?
>
> I have a matrix with double components. It's taking up a lot of memory, so
> I
> want to multiply then turn it to integers. I'm pre
You seem to be in Circle 1 of 'The R Inferno'.
Your technique does work, just not the
way that you expect. Try doing:
range( (mat * 100) %% 1)
The 'zapsmall' function might be of interest
as well.
On 26/03/2010 21:05, JustinNabble wrote:
Can anyone explain this?
I have a matrix with double
Can anyone explain this?
I have a matrix with double components. It's taking up a lot of memory, so I
want to multiply then turn it to integers. I'm pretty certain that there are
only 2 decimal places, but I wanted to check by using modulo. E.g.
mat = matrix(11:50/100, ncol=4,nrow=10) #Matrix wi
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