Displaying 20 results from an estimated 600 matches similar to: "accuracy of chi-square distribution approximations"
2006 Aug 16
1
newbie needs help
I''m sure this is the billionth newbie help request on here, but I sure
am hitting my head against the wall on this.
I''ve tried numberous of Ezra''s examples that I was able to find
online. The best I''m able to get is nothing happens and development
log says:
NoMethodError (undefined method `progress'' for #<PingWorker:0x3a786c0>):
2004 Jul 13
1
MLE, precision
Hi, everyone
I am trying to estimate 3 parameters for my survival
function. It's very complicated. The negative
loglikelihood function is:
l<- function(m1,m2,b) -sum( d*( log(m1) + log(m2)
+ log(1- exp(-(b + m2)*t)) ) + (m1/b - d)*log(m2 +
b*exp(-(b + m2)*t) ) + m1*t - m1/b*log(b+m2) )
here d and t are given, "sum" means sum over these
two vairables.
the parameters
2005 Mar 07
2
Rsync write behaviour / efficiency
Rsync is efficient at transferring diffs across the wire, but how
efficient is it at updating the remote file itself (in terms of disk
operations)?
If, for example, you have a 500MB file (say an ISO) whose modification
consists solely of a few bytes added on to the beginning of the file.
Will it create an entirely new 500MB file? Or will it somehow know how to
insert the bytes at the beginning
2005 Oct 06
0
All main products from Microsoft, Adobe, Macromedia, Corel, etc.
Super software, swell prices, splendid service.
http://oemmo.117opy6rpi6r111e6jjwo1jj.zippyii.com/?ilze
People only see what they are prepared to see.
The only reward for love is the experience of loving.
Men have become the tools of their tools
Nature and Books belong to the eyes that see them.
We don't know a millionth of one percent about anything.
Nothing great was
2006 Apr 26
1
Problems with Eicon Diva V-4BRI - 2nd Port
Hey guys
This is probably for Armin, but I thought maybe someone else might have
something I could try. I'm having a problem with one of my Eicon Diva
V-4BRI cards and I'm trying to work out if its a driver configuration
error, card failure or telco problem:
I have an Asterisk box running -- the Eicon drivers see all four ports
on my card, capi.conf is configured with all four ports
2000 Dec 14
2
Accuracy problem in dchisq for non-central chi-squared
Hi,
I think I have identified a inaccuracy in dchisq when the non-centrality
parameter is non-zero and large. Here's a little test:
sys.dchisq.test <- function(N = 100000,mean = 0)
{
z <- rnorm(N,mean = mean, sd = 1)
x <- z^2
xmin <- min(x)
xmax <- max(x)
br <- seq(xmin,xmax,length = 101)
dbr <- br[2]-br[1]
hist(x,br)
p <- dchisq(br,df = 1,ncp =
2001 Jun 26
5
breaks in hist()
I was using the hist() function to create a frequency table of some network
traffic data. The range in values is rather large, from 0 till just under
10e12. Calling hist(x, breaks=c(0,1000,1e6,1e9,1e12),plot=F,freq=T) causes
hist() to return :
$breaks
[1] -1.0000e+05 1.0100e+05 1.1000e+06 1.0001e+09 1.0000e+12
Is this recalculation of the breaks by hist() intended?
Maarten van Gelder.
2008 Sep 01
1
Porting Swfdec to Mac OS X & Timing question
Hi all:
I've been working on porting Swfdec to Mac OS X on my own time. So far
I'm making some progress; stuff is displaying and events are working.
I still have a bit of work to do, but in the meantime, I have some
questions:
1. How does one get the ability to commit things to the repository? I
don't expect this right away; I'll probably just distribute the Mac OS
X
2007 Nov 03
1
Pearson residuals
Dear Sirs
What is the best aproximation to the standardized normal distribution:
necessidade = c("sem necessidade","com necessidade")
tipo =c("CE-1", "CE-2", "CE-3")
dados=c(20,34,44,69,9,3)
Tabela =cbind(expand.grid(list(Necessidade=necessidade, Tipo=tipo)),
count=dados)
Tabela.array=tapply(Tabela$count, Tabela[,1:2], sum)
ni =
2009 Jun 07
1
One rather theoretical question about fitting algorithm
Hi,
What I'm trying to achieve is very fast algorithm for fitting logistic
regression model. I have to estimate regression coeficients using
about 10k observations. Once I have coefficients estimated, new 100
rows of data becomes available.... Now I need to reestimate
coeficients using 100 newly arrived observations and removing 100
oldest observations.
So, my question is would it be
2013 Aug 09
1
com32 module compatibility between 5.x versions
Pete Batard <pete at akeo.ie> wrote:
> On 2013.08.09 16:24, Bernd Blaauw wrote:
> >> Sorry. If you are substituting any files you should substitute them all.
> >
> From where I stand, the idea that someone using an ISO will only ever
> use it in optical media mode (either real or emulated) is a thing of
> the past.
>
> These days, you can be almost certain
2005 Aug 23
0
[Asterisk-Dev] Severe ISDN signal distortion in CVS-HEAD with octoBRI
BUG/SYMPTOMS:
1.Under certain circumstances, octoBRI (and most likely quadBRI) ISDN
cards (Junghanns/CologneChip) severely distort certain ISDN payload.
2.Although these claims relate to the bristuff patch, the problem might
not be limited to bristuff and in fact be rather asterisk/zaptel/libpri
related.
3.Signal distortion is limited to the use of the CVS version of the
Bristuff patch for
2006 Aug 16
7
Forward of moderated message
OK I know whats happening. Your while loop completes and calls kill
on the worker before your task_progress controller method ever gets
called> So the worker is deleted and when you try to access it from
rails you get an error because there is no longer a worker at that
job key. The kill method is meant to be used within a worker that you
fire and forget. If you want to get the
2007 Nov 16
18
Multithreading / multiprocessing woes
I''ve been running some multithreaded tests on Ferret. Using a single
Ferret::Index::Index inside a DRb server, it definitely behaves for me
as if all readers are locked out of the index when writing is going on
in that index, not just optimization -- at least when segment merging
happens, which is when the writes take the longest and you can
therefore least afford to lock out all reads.
2008 Feb 11
4
Seeking to granules in discontinuous streams
> The advantage of storing this in the granulepos field itself, like
> theora and CMML do, is that the seek code may already understand how
> to handle the back pointer. Right now everything assumes the mapping
> is from 'initialized decoder' + 'granulepos from page header' =>
> timestamp, or in the case of theora and CMML => 'timestamp' + 'last
2008 Feb 07
2
Seeking to granules in discontinuous streams
> No particular answers, but I can at least point out that the way
> things were designed for CMML was to work with the existing Ogg
> seeking algorithm. The idea is that a generic seeking routine can work
> on any Ogg file, as long as it knows the granulepos->time mapping for
> the logical bitstreams in the file. That's why all the
> timestamp-related info is crammed into
2009 Sep 04
3
Applying qqmath using gamma distribution...
Hello ALL!
Can anyone tell me how to specify qqmath() function with distribution
qgamma?
In help it is bit vague how to pass shape and scale parameters for gamma.
Thank you in advance. Best,
PM
2006 Jun 30
5
median of gamma distribution
Doese anyone know a R function to find the median of a gamma distribution?
[[alternative HTML version deleted]]
2007 Mar 20
0
problem with some fonts in native windows app.
Hi all,
I'm trying to run a native windows app with wine 0.9.33 (in ubuntu edgy)
but I some of the fonts in the app's window are not correct.
Text phrases are represented as a set of overlaped characters in a
single position, or it seems to me like that (another aproximation is
that the phrases are represented like a Japanesse Kanji character).
The extrange thing is that other text in
2004 Apr 14
1
How does nlm work?
Dear R users,
I have looked in the reference
Schnabel, R. B., Koontz, J. E. and Weiss, B. E. (1985) A modular
system of algorithms for unconstrained minimization. _ACM Trans.
Math. Software_, *11*, 419-440.
cited in the nlm help.
This article says that the algorithm permits the use of step selection
(line search, dogleg and optimal step), analytic or finite diference
gradient