search for: overoptimistic

Displaying 4 results from an estimated 4 matches for "overoptimistic".

2005 Dec 20
0
pmin(), pmax() - slower than necessary for common cases
...uot; from rounding error of about 1 to 2 bits...} currently in R. One "solution" could be to provide pmin2() and pmax2() functions based on trival .Internal() versions. The experiments below are for the special case of k=0 where I found the above mentioned factor of 19 which is a bit overoptimistic for the general case; here is my pmax-ex.R source file (as text/plain attachment ASCII-code --> easy cut & paste) demonstrating what I claim above. -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: pmax-ex.R Url: https://stat.ethz.ch/pi...
2011 Jan 24
2
Implementing step-wise linear regression
Dear R fans, I am trying to do step-wise linear regression using the F-test to decide which variables to admit. Ewout Steyerberg suggests using the F-test for this purpose. I first build a model using no variables using lm(y ~ 1) and then using one variable that is a strong predictor using lm(y ~ x). When I call var.test on these two models, I do not get a significant p-value—0.07. But a
2002 Dec 11
12
File Systems - Which one to use?
We are looking at implementing a Linux box running samba in the near future with about 1TB of disk online. The purpose of this box will be for basic file and printer sharing needs. I am doing research on the different journaling file systems avaible in RH 7.3 and up (ext3, reiserFS, and JFS) and was wondering if anyone has had any real world experience with them (mostly reiserFS and JFS) and
2011 Jan 25
1
[RFC] Updates to ACP smart driver
This patch introduces a handful of new options, I mentioned earlier in: http://www.mail-archive.com/nut-upsdev at lists.alioth.debian.org/msg02088.html See the large commit message in the follow-up for the details and rationale. I realize it's a bit larger diff - so if it's required I can split it into few smaller ones. Michal Soltys (1): APC smart driver update and new features.