Displaying 20 results from an estimated 8000 matches similar to: "How to get p-values"
2005 May 09
1
units of a biplot
Hello everybody,
I am afraid this might be a stupid question, but after scanning a little
bit through the help archive and the internet, I didn't come up with an
answer myself.
I have done a principle component analysis on a data set, which yields
the mean response of 14 olfactory neurons to 16 different odors. When
plotting the result in a biplot, it nicely shows me the odors in
2002 Mar 20
2
Scaling Data
Sorry to bother you with such a question. I'm new to R and have tried to
figure it out myself for a while, but well.
How can I change the scaling of the axis?
If for example I have:
a<-1:30
plot(a,type="b")
The axis is scaled from 1 to 30.
plot(a,xlim=c(1,3))
Just shows me the first three entries of a, but not all 30 scaled from 1
to 3 with 0.1 ticks.
I guess there must be
2003 Jul 07
1
P-value for F from summary.lm (was RE: (no subject))
[Please use the subject line!]
In the help page for summary.lm, the "Value" section says that the returned
object has a component called "fstatistic", which has the F-statistic and
the associated numerator and denominator degrees of freedom. You can get
the p-value by something like:
fstat <- summary(speciallinearmodel)$fstatistic
pval <- pf(fstat[1], fstat[2],
2009 Jan 09
1
[R 2.8.1 on AIX 5.3] WARNING: tiffio.h: present but cannot be (PR#13440)
Dear r-bugs,
With
AIX 5.3
and
OBJECT_MODE=64
CC="xlc -q64"
CXX="g++ -maix64"
and
./configure --without-iconv --enable-R-shlib
the following warning occurs:
configure: WARNING: tiffio.h: present but cannot be compiled
configure: WARNING: tiffio.h: check for missing prerequisite
headers?
2008 Jul 31
4
syslog with PID
Hi,
LOG_NDELAY is the only option for openlog() in dovecot 1.1.2.
Wouldn't be
LOG_NDELAY|LOG_PID as option parameter much more useful?
Without logging
the pid, it is impossible to match 'Disconnected' log entries and the
corresponding session start/login. Therefore I suggest to use
LOG_NDELAY|LOG_PID
in the options of i_set_failure_syslog() at all 6 occurrences which passes
it
2003 Sep 16
3
Compilation of 3.7p1 failed on IRIX (missing file)
Version 3.7p1 of OpenSSH can't be compiled on IRIX 6.5 because the file
openbsd-compat/inet_ntoa.h
is missing. It is possible to compile successfully using this file out of
version 3.6.1p2.
Heiko
Heiko Schlichting | Freie Universit?t Berlin
heiko at FU-Berlin.DE | Zentraleinrichtung f?r Datenverarbeitung (ZEDAT)
Telefon +49 30 838-54327 | Fabeckstra?e 32
Telefax +49 30
2010 Jan 28
1
Setting breaks for histogram of dates
Hi,
I have a list of dates like this:
date
2009-12-03
2009-12-11
2009-10-07
2010-01-25
2010-01-05
2009-09-09
2010-01-19
2010-01-25
2009-02-05
2010-01-25
2010-01-27
2010-01-27
...
and am creating a histogram like this
t <- read.table("test.dat",header=TRUE)
hist(as.Date(t$date), "years", format = "%d/%m/%y", freq=TRUE)
2018 Feb 20
0
JGR not installed. Attempting to install from CRAN...
Hi Jenny,
Jenny Coetzee <coetzeeJ at phru.co.za> writes:
> Hello
>
> I am new to R, and am running a programme called RDS Analyst which
> uses R. When trying to open RDS i am getting the following message:
> JGR not installed. Attempting to install from CRAN?
>
> I am not sure if the issue is a Java one or an R one?
>
> I am working off a Mac using High Sierra
2006 Apr 27
1
Plotting Data Frame
Dear R community members,
I think I am asking a very simple question, but I really looked up in
the faqs and manuals and found nothing helpful.
I am trying to plot a data frame with the following structure (this is
just a small extract):
glo conc odor line series X1 X2 X3 X4 X5
X6 X7 X8 X9 X10 X11 X12 X13
1 0 AIR LN1 UP -0.488
2018 Feb 16
2
error in loading rgdal package
Hi R users,
Could you help me to see this problem? I could now load "rgdal" even though
I downloaded the compressed folder. Thanks for your help.
Loading required package: sp
Error in dyn.load(file, DLLpath = DLLpath, ...) :
unable to load shared object
'/Library/Frameworks/R.framework/Versions/3.3/Resources/library/rgdal/libs/rgdal.so':
[[alternative HTML version deleted]]
2002 Apr 23
1
[Bug 214] IRIX utmp problem loginrec.c: line_abbrevname() goes wrong
http://bugzilla.mindrot.org/show_bug.cgi?id=214
djm at mindrot.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
------- Additional Comments From djm at mindrot.org 2002-04-23 23:08 -------
Similar patch applied - please test tommorow's
2018 Feb 20
3
JGR not installed. Attempting to install from CRAN...
Loris, thank you thank you so much!!!
do you know which CRAN mirror i select? There are loads - all related to various countries..
so appreciate the help
Jenny
Jenny Coetzee (PhD Candidate)
Head of Prevention in Key Populations & Head of the Soweto Sex Worker Project
Perinatal HIV Research Unit (PHRU)
New Nurses Home
Chris Hani Baragwanath Academic Hospital
Soweto
B: +27 11 989 9821
M:
2018 Jan 12
2
R minor version
Hi,
When I install a package as a non-root user, it gets saved in a path
such as
~/R/x86_64-unknown-linux-gnu-library/3.4
for any R version 3.4.x. Thus, if I want to install the packages
somewhere else, as root say, I might do
install.packages("somepackage","/some/where/else/R/site-library/3.4")
In this case I would then want to construct the appropriate path in,
say,
2011 Aug 19
3
Calculating p-value for 1-tailed test in a linear model
Hello,
I'm having trouble figuring out how to calculate a p-value for a 1-tailed
test of beta_1 in a linear model fit using command lm. My model has only 1
continuous, predictor variable. I want to test the null hypothesis beta_1
is >= 0. I can calculate the p-value for a 2-tailed test using the code
"2*pt(-abs(t-value), df=degrees.freedom)", where t-value and degrees.freedom
2002 Dec 08
3
strange QQ-Plot
Hi,
i am working on a data set with EDA. That includes QQ-Plots of
residuals vs expected normal distribution.
What puzzles me is that the range of ordinate and abscissae is
so different: while the theoretical quantiles range from [-2, 2]
the sample quantiles on the ordinate do extent from [-20, 50].
Quite obviously some kind of transformation is done.
Although i intensively RTFM i could not
2017 Nov 23
5
libPaths displays truncated path?
Hi,
TL;DR
-----
I define the path
/cm/shared/apps/R/site-library/3.4.2
and add it to libPath. Why does libPath then display it as
/cm/shared/apps/R/site-library/3.4
?
Long version
------------
I run a cluster of diskless nodes for which the OS is loaded
directly into RAM and other software is provided by an NFS server.
However, in the case of R, we use the R version provided
2018 Feb 20
0
JGR not installed. Attempting to install from CRAN...
Hi Jenny,
Jenny Coetzee <coetzeeJ at phru.co.za> writes:
> Loris, thank you thank you so much!!!
>
> do you know which CRAN mirror i select? There are loads - all related to various countries..
>
> so appreciate the help
It shouldn't really matter, although I'd choose one that is
geographically close. Occasionally there can be problems with HTTP
vs. HTTPS, which
2009 Jul 20
1
package lmodel2: p-value RMA fitting?
Hi *,
is there a way to obtain some kind of p-value for a model fitted with RMA
using the lmodel2 package?
I know that p-values are discussed and criticized a lot and as you can image
from my question I'm not
very much of a statistican (only writing my bachelor thesis).
As fare as I understood the confidence interval statistic correctly, a
coefficient is regarded as statistically
significant
2018 Feb 20
2
JGR not installed. Attempting to install from CRAN...
Hello
I am new to R, and am running a programme called RDS Analyst which uses R. When trying to open RDS i am getting the following message: JGR not installed. Attempting to install from CRAN?
I am not sure if the issue is a Java one or an R one?
I am working off a Mac using High Sierra
Any help please..?
thanks
Jen
Jenny Coetzee (PhD Candidate)
Head of Prevention in Key Populations
2009 Feb 05
1
Incorrect p value for binom.test?
I believe the binom.test procedure is producing one tailed p values
rather than the two tailed value implied by the alternative hypothesis
language. A textbook and SAS both show 2*9.94e-07 = 1.988e-06 as the
two tailed value. As does the R summation syntax from R below. It
looks to me like the alternative hypothesis language should be revised
to something like " ... greater than or equal