Displaying 20 results from an estimated 200 matches similar to: "On efficiency, Vectorize and loops"
2010 Jul 18
2
loop troubles
Hi all, I appreciate the help this list has given me before. I have a
question which has been perplexing me. I have been working on doing a
Bayesian calculating inserting studies sequentially after using a
non-informative prior to get a meta-analysis type result. I created a
function using three iterations of this, my code is below. I insert prior
mean and precision (I add precision manually
2006 Apr 28
5
Maildir + NFS + multiple machines = spectacular failure
I'm running beta7 on two machines, with maildir on NFS. I have lockd
running on all machines. I've found that Dovecot is highly unstable with
NFS when accessing a mailbox on more than one machine at the same time.
Both dovecot machines have:
mmap_disable = yes
lock_method = fcntl
NFS is version 3, exported from a third linux machine. All machines are
running 2.6.9 kernel.
Any ideas
2006 Sep 27
1
Trouble with xen-unstable x86_64
Hello,
I downloaded the latest unstable and installed on 2 amd dual athalon 64
x2''s (dual cores).
Kernel went fine. I''m getting this error when trying to start xend :
ImportError: /usr/lib64/python/xen/lowlevel/xc.so: cannot open shared
object file: No such file or directory
.Traceback (most recent call last):
File "/usr/sbin/xend", line 49, in ?
from
2010 Nov 16
2
Vectors out of lists?
Hello there
I have a list, Y, and each component of that list is a real-valued function
(that is, Y[[i]](u) returns a number).
I was wishing to build the mean function and the first thing I thought of
was
Ybar<-function(u){
mean(Y[[1:n]](u))
}
but obviously this doesn't work, since Y[[1:n]] is not allowed at all.
Any elegant suggestions? I really would like to avoid something like
2007 Apr 10
15
Poor man''s backup by attaching/detaching mirror drives on a _striped_ pool?
Hi,
one quick&dirty way of backing up a pool that is a mirror of two devices is to
zpool attach a third one, wait for the resilvering to finish, then zpool detach
it again.
The third device then can be used as a poor man''s simple backup.
Has anybody tried it yet with a striped mirror? What if the pool is
composed out of two mirrors? Can I attach devices to both mirrors, let them
2011 Jun 03
2
Y error bars, dates on the X-axis
Dear forum,
Does anyone know any functions for plotting vertical error bars, if the
x-axis variable is a date?
I can produce a pretty plot with dates on the x-axis, if I don't want to
include error bars. I can also produce a nice plot with error bars, if I
just use Julian days for the x-axis, but I'd much rather have the actual
dates.
I have tried writing my own function, plotCI
2006 Apr 06
1
lib02_imap_quota_plugin.so: undefined symbol: quota
Hi folks.
We're trying to set up Dovecot with Maildir++ quotas. Operating system is
CentOS 4.3 (final) X86 using Dovecot 1.0b5.
After logging in, I get the following logged through syslog and the
connection closes:
Apr 6 10:39:36 dev3 dovecot: imap(jtest): Loading modules from directory:
/usr/local/lib/dovecot/imap
Apr 6 10:39:36 dev3 dovecot: imap(jtest):
2008 Jul 20
3
asp and ylim
#See David Williams' book "Weighing the odds", p286
y <- c(1.21, 0.51, 0.14, 1.62, -0.8,
0.72, -1.71, 0.84, 0.02, -0.12)
ybar <- mean(y)
ylength <- length(y)
ybarv <- rep(ybar, ylength)
x <- 1:ylength
plot(x,y,asp=1,xlab="position",ylab="ybar",type="n",ylim=c(-1,1))
segments(x[1], ybar, x[ylength], ybar)
segments(x,ybarv,x,y)
2008 Jul 20
4
drawing segments through points with pch=1
Please excuse me for asking such basic questions:
Here is my code
> y=c(1.21,0.51,0.14,1.62,-0.8,0.72,-1.71,0.84,0.02,-0.12)
> ybar=mean(y)
> ll=length(y);
> ybarv=rep(ybar,ll)
> x=1:ll
> plot(x,ybarv,pch=1)
> segments(x[1],ybar,x[ll],ybar)
What I get is a collection of small circles, with a segment "on top"
of the circles, which is almost what I want. But I
2008 Sep 06
2
Hopefully an easy error bar question
Hi im trying to add error bars to my barplots, there very basic, i have a few grapghs where the y variable is different but on all the X variable is Age (Adult and Juvenile) however this is split into two levels so i have males and females, so my graph basically has four bars on it.
I know how to add eror bars for instance when there is only one level eg lookng at the diffrence between male and
2003 Apr 15
1
current cvs
hi,
so after upgrade to the current cvs all of our problem disappear:-)
but we don't have time to test the ssl part...
although after I compile and install the new dovecot I stop it I do a
--------------------
find /home/*/Maildir -name '.imap*' -exec rm {} \;
find /home/*/Maildir -name 'dovecot-uidlist' -exec rm {} \;
find /home/*/Maildir -name 'msgid.cache' -exec rm
2007 Sep 25
2
Need help with function writing
Hello:
If anyone could guide me with this I would greatly appreciate it. Thanking you in advance for your assistance.
Using a 3-level input factor alternative so that a function(below) can compute both a two-sided and one-sided p-values. Making the two-sided test the default. And produce output information about which alternative was tested. Where would I place the ifelse statement?
2000 Jul 08
1
iteration scheme
Dear friends.
On p 95 in 3. ed. MASS a zero-truncated Poisson distribution is analyzed. I
understand the probability distribution and expected mean. The Newton
iteration scheme is
Lam(m+1)=Lam(m)-[Lam(m)-Ybar(1-exp(-Lam(m))]/[1-Ybar*exp(-Lam(m)], and I
suppose the latter part should be f(Lam(m))/f ' (Lam(m)) and f(Lam(m)) is
Lam(m)/(1-exp(-Lam(m)), right ? But then
f ' (Lam(m)) is
2002 May 11
2
Bug on Mac version of lm()?
Dear Mac users,
Hi, as you might have probably read the thread of
"[R] Rsquared in summary(lm)" on May 10, it seems that Mac version of
lm() seem to be working incorrectly.
I enclose the script to produce the result both for lm() and manual
calculation for a simple regression. Could you run the script and
report with the version of R, so I don't have to go through every
builds
2007 Sep 24
1
hypothesis testing
This was sent to me by someone on the R-list ( I don't know her ) but I
don't have time to look at this right now so I told her I would send
it to the R-list because she said it keeps getting bounced when she
sends it.
#=======================================================================
====================================================================
I am a bit confused with
2007 Nov 07
1
Homework help: t test hypothesis testing with summarized data?
Is this how a t hypothesis test is done when I don't have the actual
data, but just the summarized statistics:
> #Homework 9.2.6 [1]
> n<-31
> xbar<-3.10
> s_x<-1.469
> m<-57
> ybar<-2.43
> s_y<-1.35
> s_pooled<- (((n-1)*s_x^2) + ((m-1)*s_y^2)) / (n + m - 2)
> s_pooled
[1] 1.939521
> t_obs <- (xbar - ybar) / (s_pooled * (sqrt(1/n + 1/m)))
2008 Sep 30
1
Using sub to get captions in barplots
All,
I've been using "sub" (subtitle) instead of "main" such that captions are
below figures produced by xyplot. This works fine and captions are on a
single line. However, when I try this for bar plots with error bars
(altering the error.bars function form Crawley's The R Book, see below), the
captions are split on more than 1 line. Is there a way to get the
2006 Apr 19
0
[patch] Re: Test migration (IMAP copy) and INTERNALDATE?]
I haven't been able to find what is responsible for altering the time on
APPENDed mail, but was able to come up with a temporary workaround ...
simply calling utime() later on in the process resolves it.
Below is my patch.
Steve
--- dovecot-1.0.beta7-orig/src/lib-storage/index/maildir/maildir-save.c
2006-03-25 05:53:43.000000000 -0500
+++
2011 Jan 19
3
Installing on CentOS
Hi,
I''m trying to install RedCloth on CentOS. It came with ruby 1.8.5
pre-installed so I installed rubygems-1.2.0 since that seemed compatible
(later versions require ruby 1.8.6).
All looks good but when I try:
[root at dev4 rubygems-1.2.0]# gem install RedCloth
ERROR: could not find gem RedCloth locally or in a repository
Can anyone tell me what I''m missing? Do I need to
2006 May 02
1
Bug in yesterday's CVS..
Hi Timo.
I'm doing some testing with yesterday's CVS code and believe I've found a
bug.
In SquirrelMail, I get 5 messages in INBOX (doesn't matter how). I click
"Toggle All" then "Delete". All 5 messages move to Trash.
The Trash folder gets a link "expunge". I click that and get the
following error:
ERROR : Bad or malformed request.
Query:STORE