[R] reverse truncate to extract only decimal values
hello there, Is there a way of truncating in the opposite direction so as to retain only the values to the right of the decimal?? i.e. rather than: trunc(39.5) [1] 39 i would get something like: revtrunc(39.5) [1] 0.5 I've been searching to no avail but I imagine there is a very simple solution! Tyler -- View this message in context: http://www.nabble.com/%22reverse-truncate%22-to-extract-only-decimal-values-tp23086851p23086851.html Sent from the R help mailing list archive at Nabble.com. __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] reverse truncate to extract only decimal values
You could do something like this:
revtrunc - function(x) { x - floor(x) }
revtrunc(39.5)
[1] 0.5
But note:
revtrunc(-39.5)
[1] 0.5
I'm not sure what you'd want for negative numbers. One possibility:
revtrunc - function(x) { sign(x) * (x - floor(x)) }
revtrunc(39.5)
[1] 0.5
revtrunc(-39.5)
[1] -0.5
Sarah
On Thu, Apr 16, 2009 at 5:30 PM, T.D.Rudolph prairie.pic...@gmail.com wrote:
hello there,
Is there a way of truncating in the opposite direction so as to retain only
the values to the right of the decimal??
i.e. rather than:
trunc(39.5)
[1] 39
i would get something like:
revtrunc(39.5)
[1] 0.5
I've been searching to no avail but I imagine there is a very simple
solution!
Tyler
--
Sarah Goslee
http://www.functionaldiversity.org
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] reverse truncate to extract only decimal values
On Thu, Apr 16, 2009 at 10:30 PM, T.D.Rudolph prairie.pic...@gmail.com wrote: Is there a way of truncating in the opposite direction so as to retain only the values to the right of the decimal?? i.e. rather than: trunc(39.5) [1] 39 i would get something like: revtrunc(39.5) [1] 0.5 I've been searching to no avail but I imagine there is a very simple solution! revtrunc - function(x) x-trunc(x) Paul __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] reverse truncate to extract only decimal values
On Thu, Apr 16, 2009 at 10:30 PM, T.D.Rudolph prairie.pic...@gmail.com wrote: hello there, Is there a way of truncating in the opposite direction so as to retain only the values to the right of the decimal?? i.e. rather than: trunc(39.5) [1] 39 i would get something like: revtrunc(39.5) [1] 0.5 I've been searching to no avail but I imagine there is a very simple solution! 'minus'? x - trunc(x) ? Barry __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] reverse truncate to extract only decimal values
This one really sheds light on that old adage
...When you can't see the forest for the trees!
Sarah Goslee wrote:
You could do something like this:
revtrunc - function(x) { x - floor(x) }
revtrunc(39.5)
[1] 0.5
But note:
revtrunc(-39.5)
[1] 0.5
I'm not sure what you'd want for negative numbers. One possibility:
revtrunc - function(x) { sign(x) * (x - floor(x)) }
revtrunc(39.5)
[1] 0.5
revtrunc(-39.5)
[1] -0.5
Sarah
On Thu, Apr 16, 2009 at 5:30 PM, T.D.Rudolph prairie.pic...@gmail.com
wrote:
hello there,
Is there a way of truncating in the opposite direction so as to retain
only
the values to the right of the decimal??
i.e. rather than:
trunc(39.5)
[1] 39
i would get something like:
revtrunc(39.5)
[1] 0.5
I've been searching to no avail but I imagine there is a very simple
solution!
Tyler
--
Sarah Goslee
http://www.functionaldiversity.org
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
--
View this message in context:
http://www.nabble.com/%22reverse-truncate%22-to-extract-only-decimal-values-tp23086851p23087144.html
Sent from the R help mailing list archive at Nabble.com.
__
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
