Displaying 20 results from an estimated 8000 matches similar to: "qt for df < 1"
2003 May 13
1
qt(p,df) discontinuous in p for df in 1.01->1.7 (PR#2991)
Full_Name: Jens Lund
Version: Version 1.7.0 (2003-04-16)
OS: Win NT 4.0 SP 6
Submission from: (NULL) (193.3.225.210)
As the T distribution is symmetrical around 0 qt(0.5,df) should return 0 for any
df.
However for df close to 1 it seems to have problems as seen by:
qt(0.5,seq(1,1.1,by=0.0001))
For example:
> qt(0.5,1.01)
[1] -0.2300470
Higher df as df=1.1 (and up to approx df=1.7) seem
2008 Oct 12
1
qt with df<1 (repost)
Sorry about the html-formatted message. Here it is again in plain text.
Hello,
The function qt returns NaN for degrees of freedom <1. For example:
> qt(0.5,0.5)
[1] NaN
Warning message:
In qt(p, df, lower.tail, log.p) : NaNs produced
But qt(0.5,0.5) should be 0, since the distribution is symmetric.
> pt(0,0.5)
[1] 0.5
It actually fails with any value, as long as df<1.
Is this a
2006 Jul 30
1
Parametric links for glm?
At useR 2006 I mentioned that it would be nice to have a way to
specify binomial links
that involved free parameters and described some experience with a
Gosset link involving
a free degrees of freedom parameter, and a Tukey-lambda link with two
free parameters.
My implementation of this involved some rather kludgey modifications
of binomial,
make.link and glm that (essentially) added a
2009 Jun 30
2
odd behaviour in quantreg::rq
Hi,
I am trying to use quantile regression to perform weighted-comparisons of the
median across groups. This works most of the time, however I am seeing some
odd output in summary(rq()):
Call: rq(formula = sand ~ method, tau = 0.5, data = x, weights =
area_fraction)
Coefficients:
Value Std. Error t value Pr(>|t|)
(Intercept) 45.44262 3.64706 12.46007
2019 Jun 28
2
tools::package_native_routine_registration_skeleton?
> ... reports that the fortran names of all the registered fortran functions are ?undocumented objects?...
Those symbols should not be exported. In quantreg v5.33, NAMESPACE has 'exportPattern(".")'. Maybe it is a good time to remove that and export explicitly the symbols that are meant for export.
Georgi Boshnakov
------------------------------
Message: 6
Date: Fri, 28
2019 Jun 28
1
tools::package_native_routine_registration_skeleton?
On 28/06/2019 6:27 a.m., Koenker, Roger W wrote:
> Thanks, I was just coming to that conclusion and beginning to look for a way to make a list of
> exportable objects.
After library(quantreg), ls("package:quantreg") will list all the names
you currently export. So
cat(ls("package:quantreg"), sep = ", ")
will print the list in a form suitable for including
2012 Aug 20
1
CEBA-2012:1176 CentOS 5 qt FASTTRACK Update
CentOS Errata and Bugfix Advisory 2012:1176
Upstream details at : http://rhn.redhat.com/errata/RHBA-2012-1176.html
The following updated files have been uploaded and are currently
syncing to the mirrors: ( sha256sum Filename )
i386:
a6cd4b15ef3e4a0fd758ecbe42a1580d1ea42a55a7f58a167fbc4ef38ede18ad kdebase-3.5.4-26.el5.centos.i386.rpm
2008 Oct 12
0
qt with df<1
Hello,
The function qt returns NaN for degrees of freedom <1. For example:
> qt(0.5,0.5)
[1] NaN
Warning message:
In qt(p, df, lower.tail, log.p) : NaNs produced
But qt(0.5,0.5) should be 0, since the distribution is symmetric.
> pt(0,0.5)
[1] 0.5
It actually fails with any value, as long as df<1.
Is this a bug, or is there some fundamental reason why this cannot be
computed?
2015 Mar 25
2
vignette checking woes
Thierry,
I have this:
if (require(MatrixModels) && require(Matrix)) {
X <- model.Matrix(Terms, m, contrasts, sparse = TRUE)
in my function rqss() I've tried variants of requireNamespace too without success.
If I understand properly model.Matrix is from MatrixModels but it calls
sparse.model.matrix which is part of Matrix, and it is the latter function that I'm
not
2008 Jun 09
1
Student Distribution and Funtion qt
Hello,
I am trying to calculate and plot mean and confidence intervall for a set of data. This is the code that I am currently using:
means <- sapply(data, mean, na.rm=TRUE)
n <- sapply(data,length)
stdev <- sqrt(sapply(data, var, na.rm=TRUE))
ciw <- qt(0.98, n) * stdev / sqrt(n)
par(mgp=c(2,0.6,0), las=2, fin=c(7,3), mai=c(1,0.5,0.2,0.2), cex=0.8)
plotCI(x=means, uiw=ciw,
2006 Dec 19
2
configure don't check Qt libraries
..
checking for wnck_window_has_name... yes
checking for METACITY... yes
checking for Qt headers... /opt/qt/include
checking for Qt libraries... no
configure: creating ./config.status
..
..
gnome: no
kde: no
..
I have tried to compile kde window decorator, but "configure" don't
check my Qt installation and it don't have a option to specify the path.
Thanks for your
2007 Jan 02
6
package dependency tree
Is there a painless way to find the names of all packages on CRAN
that "Depend" on a specified package?
url: www.econ.uiuc.edu/~roger Roger Koenker
email rkoenker at uiuc.edu Department of Economics
vox: 217-333-4558 University of Illinois
fax: 217-244-6678 Champaign, IL 61820
2020 May 18
3
dbinom link
In principle a good idea, but I'm not sure the whereabouts of Catherine Loader are known at this point. Last peeps from her on the net seem to be about a decade old.
.pd
> On 18 May 2020, at 10:31 , Abby Spurdle <spurdle.a at gmail.com> wrote:
>
> This has come up before.
>
> Here's the last time:
> https://stat.ethz.ch/pipermail/r-devel/2019-March/077478.html
2008 Jun 14
1
qt with ncp>37.62
help(qt) states that:
"ncp non-centrality parameter delta; currently except for rt(), only for
abs(ncp) <= 37.62"
so I would expect that calling qt with non-centrality parameter exceeding
37.62 should fail, instead e.g. calling
> mapply(function(x) qt(p = 0.9, df = 55, ncp = x),35:45)
gives:
[1] 40.21448 41.35293 42.49164 43.68862 44.82945 45.97048 47.11170 48.25310
[9]
2007 Aug 05
2
Question regarding QT device
Hi,
After a few modifications in the makefiles, I successfully compiled
the Qt device (written by Deepayan Sirkar) for OS X 10.4.9 on a
Powerbook.
However when loading into R
If i remove this line from zzz.R in qtutils/R
grDevices::deviceIsInteractive("QT")
and then install
>library(qtutils)
loads fine and the QT() calls returns a QT window, however, if i
switch to
2011 Feb 17
1
vanilla kernel configuration :: xconfig --> qt errors
Hi! It seems that i made some changes that make xconfig to not work ..
the problem is that not matter what QTDIR i select i receive the same
errors that start with :
adrian at sevcenco: linux-2.6.37 $ make O=/home/adrian/kernel/kernel_out
xconfig
GEN /home/adrian/kernel/kernel_out/Makefile
HOSTCXX scripts/kconfig/qconf.o
/usr/lib64/qt4/include/Qt3Support/q3toolbar.h:45: error:
2018 Nov 27
2
CentOS 7 package not present in Red Hat EL 7 - qt-assistant
I'm using CentOS 7 for development of software that is sometimes used on
Red Hat Enterprise Linux 7. I conjunction with an update of one of the
applications, I asked some Red Hat users to install the Qt 4 Assistant
application via the qt-assistant package (which is used by a "help"
function in our software.) It seemed like there was no such package in
the Red Hat package set,
2008 Dec 03
1
function qt can fails if ndf < 1 (PR#13364)
Full_Name: Gerard Torrent
Version: R version 2.8.0 (2008-10-20)
OS: Linux 2.6.27.5-41.fc9.x86_64 #1 SMP
Submission from: (NULL) (85.52.227.233)
In some cases qt complains about NaNs and don't gives the correct result:
> qt(0.1,, 0.1)
[1] NaN
Warning message:
In qt(p, df, lower.tail, log.p) : NaNs produced
But the result can be found:
> pt(-1.60443e+06, 0.1)
[1] 0.09999997
If I
2020 May 18
2
dbinom link
FWIW the link from ?dbinom to the Loader paper on Binomials is broken but the paper seems to be
available here: https://octave.1599824.n4.nabble.com/attachment/3829107/0/loader2000Fast.pdf
Roger Koenker
r.koenker at ucl.ac.uk<mailto:r.koenker at ucl.ac.uk>
Honorary Professor of Economics
Department of Economics, UCL
Emeritus Professor of Economics
and Statistics, UIUC
[[alternative
2011 Sep 11
5
Link between Qt GUI and R
hi,
i want to build a Qt front-end GUI which communicates with R, and i am not
sure what i should use for the interface. There seems to be many ways:
R.dll, Rinside, Rcpp, RQt, Rtools... . what is the best way? please advice.
basically what i want to do is that, the Qt GUI will allow users to make
selection and enter numbers, these inputs will be fed to R, already written
.R files will perform