Jonathan,
I'd just return the integer part of the common log:
floor(log10(x))
Dave
From:
Jonathan P Daily <jda...@usgs.gov>
To:
r-help@r-project.org
Date:
12/07/2010 01:44 PM
Subject:
[R] More elegant magnitude method
Sent by:
r-help-boun...@r-project.org
I have a need to find the order of number to get a scaling parameter as a
power of 10. I have a function that works *so far*, but it is ugly and
probably buggy. In the interest of avoiding code-based outliers in my
data, I thought I would ask if anyone here has a better way.
> scl <- function(x){
+ length(charToRaw(format(trunc(x), scientific = F)))-1}
> a <- 123456789
> b <- 1E15
> c <- 12.345
> scl(a)
[1] 8
> scl(b)
[1] 15
> scl(c)
[1] 1
Thanks
--------------------------------------
Jonathan P. Daily
Technician - USGS Leetown Science Center
11649 Leetown Road
Kearneysville WV, 25430
(304) 724-4480
"Is the room still a room when its empty? Does the room,
the thing itself have purpose? Or do we, what's the word... imbue it."
- Jubal Early, Firefly
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