On Oct 12, 2010, at 5:11 PM, Łukasz Ręcławowicz wrote:
Let's test speed in this way:
benchmark(isTRUE(all.equal.numeric(x,y)),replications=1e3)
replications elapsed relative
user.self sys.self
1000 34.01 1
29.09 0.16
benchmark(differences<-compare$id[compare$x!=compare
$y],replications=1e3)
replications elapsed relative
user.self sys.self
1000 4.33 1
4 0
You are omitting the most time-costly act which is the creation of the
"compare" data.frame object. You are also omitting any evaluation of
"differences". So your comparison is entirely meaningless. The act of
assignment is _not_ the same as turning the differences object into a
logical result.
2010/10/12 David Winsemius <dwinsem...@comcast.net>:
The method of embedding in a dataframe is going to be really slow.
And as a result you have chosen not to include the creation of the
data.frame inside your loop.
--
Miłego dnia
David Winsemius, MD
West Hartford, CT
______________________________________________
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.
