Displaying 20 results from an estimated 700 matches similar to: "section needed in FAQ - Using R (PR#9698)"
2012 Feb 08
1
"Zoomable" time series plots
Not sure if the question is appropos, but I have multiple csv's which
are read into an xts object, corresponding to telemetry data
(accelerometer, magnetometer/compass, and gyroscope). For examination,
it would be ?ber useful if plot.zoo (or something similar) allowed me
to zoom in and out of a subset of the time axes.
--
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Envoyait de mon portable
2010 Nov 30
1
rcauchy density distribution
Hello, I'm taking samples from certain distributions and drawing a density
distribution over the histogram of the samples
It works fine for the chi-square and for the normal, but not for the cauchy. Any
idea what I'm doing wrong? Thanks
x <- rchisq(10000, df = 4)
hist(x, freq = FALSE, breaks=100)
curve(dchisq(x, df = 4), col = 2, add = TRUE)
x <- rnorm(10000)
hist(x, freq =
2005 Apr 21
0
Problems with ext3/jbd on 2.4.27-vrs1 with power management
Hello all,
I have a question about ext3/jbd for 2.4 as it pertains to the ARM
architecture. The presence of the ext3 and/or jbd drivers seem to cause
suspend/resume to stop working on our platform (SA1110 (StrongARM) -
based). My question is: are there any appropriate patches since 2.4.27
to either ext3 or jbd that may be appropos to this issue. I have also
posted to the ARM kernel mailing list
2003 Jun 01
1
Simulating a variable following an arbitrary distribution
Hi, I'd like to know if there's anything in R that could help me do
that. Let's suppose I have a density function of a random variable, for example
f(x) = (x^3)/4 0 < x < 2 and I would like to simulate it. For the common
distributions (exponencial, gamma, cauchy) there are the r-functions (rgamma,
rexp, runif, rcauchy, and so on).. But when the variable I want to simulate is
not
2007 Aug 29
3
OT: distribution of a pathological random variate
Folks,
I wonder if anything could be said about the distribution of a random variate x, where
x = N(0,1)/N(0,1)
Obviously x is pathological because it could be 0/0. If we exclude this point, so the set is {x/(0/0)}, does x have a well defined distribution? or does it exist a distribution that approximates x.
(The case could be generalized of course to N(mu1, sigma1)/N(mu2, sigma2) and one
2004 Aug 10
0
Check failed after compilation (PR#7159)
Full_Name: Madeleine Yeh
Version: 1.9.1
OS: AIX 5.2
Submission from: (NULL) (151.121.225.1)
After compiling R-1.9.1 on AIX 5.2 using the IBM cc compiler, I ran the
checks. One of them failed. Here is the output from running the check solo.
root@svweb:/fsapps/test/build/R/1.9.1/R-1.9.1/tests/Examples:
># ../../bin/R --vanilla < stats-Ex.R
R : Copyright 2004, The R
2003 Jun 02
4
Net2Phone SIP
I've been trying to use net2phone's sip service at sip.net2phone.com
with * but keep getting
SIP/2.0 401 Unauthorized. Do you know if this should be possible?
So far:
I can use an ata186 to connected directly to n2p through
sip.net2phone.com without any special settings.
I can connect from * to iconnecthere, but, whatever I try from * to n2p
produces "SIP/2.0 401 Unauthorized"
2004 Nov 30
1
lme in R-2.0.0: Problem with lmeControl
Hello!
One note/question hier about specification of control-parameters in the
lme(...,control=list(...)) function call:
i tried to specify tne number of iteration needed via
lme(....,control=list(maxIter=..., niterEM=...,msVerbose=TRUE))
but every time i change the defualt values maxIter (e.g. maxIter=1,
niterEM=0) on ones specified by me, the call returns all the iterations
needed until
2010 May 28
3
Gelman 2006 half-Cauchy distribution
Hi,
I am trying to recreate the right graph on page 524 of Gelman's 2006
paper "Prior distributions for variance parameters in hierarchical
models" in Bayesian Analysis, 3, 515-533. I am only interested, however,
in recreating the portion of the graph for the overlain prior density
for the half-Cauchy with scale 25 and not the posterior distribution.
However, when I try:
2006 Feb 01
1
Cauchy distribution limits
I have question (curiosity) regarding returned values of R's qcauchy
() function,
for nonexceedance probability (F). It seems the ideal returned range
of cauchy distribution should be [-Inf,Inf].
For F=0
> qcauchy(0)
[1] -Inf
but for F=1
> qcauchy(1)
[1] 8.16562e+15
It seems to me that the proper return value should be Inf???
For default (location=0,scale=1) quantile function of
2009 Jun 11
0
Variogram fitted by Cauchy
Hi
I'm using R(2.9.0) and gstat package under Windows to plot sample variograms.
When I want to fit them, I don't have the possibility to choose Cauchy functions. Under Mathematica for example, we have it and it seems to be the best one to fit the variograms I have
I tested the others functions, they can fit but I would,if possible, use the Cauchy one. If anybody knows something about
2009 Feb 20
0
ML estimators of bivariate cauchy
Hi all,
I am using the function COV.WT to estimate the estimators (location and
scale) of a bivariate cauchy distribution.
My doubt is about the option WT (weight), cause at the R-help shows that the
weight is uniform according to the number of observations. But, checking the
theory, for example, the mean is given by
mean_estimator=mean(u(s)x)/mean(u(s)), where
x=my data (bivariate)
2009 Mar 12
3
set size of a plot
Hi,
I have the following R-code:
pdf(file="test.pdf")
hist(rcauchy(100))
dev.off()
How can I set the size of the histogram in my pdf?
I tried to do with par(...) but I didn't find the right parameter yet.
Thanks, Max
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2010 Mar 12
2
Question regarding to maxNR
Hi R-users,
Recently, I use maxNR function to find maximizer. I have error appears as follows
Error in maxNRCompute(fn = fn, grad = grad, hess = hess, start = start, :
NA in the initial gradient
My code is
mu=2
s=1
n=300
library(maxLik)
set.seed(1004)
x<-rcauchy(n,mu,s)
loglik<-function(mu)
{
log(prod(dcauchy(x,mu,s)))
}
maxNR(loglik,start=median(x))$estimate
Does anyone know how
2002 Jun 28
1
Problem in optim(method="L-BFGS-B") (PR#1717)
Full_Name: Jörg Polzehl
Version: 1.5.1
OS: Windows 2000
Submission from: (NULL) (193.175.148.198)
When calculating MLE's in a variance component model using constrained
optimization, i.e. optim(...,method="L-BFGS-B",...) I observed an inproper
behaviour in cases where
the likelihood function was evalueted at the constraint. Parameters and value of
the
function at the constraint
2007 Nov 21
1
normalised Voigt random numbers
Dear list,
I would like to generate random numbers from a Voigt distribution,
hopefully in a way as simple as getting random numbers from a normal
distribution with 'rnorm'. Is there any package to do this? Speed is an
issue in this application. Or, as the Voigt distribution is a
convolution of a Gaussian and a Lorentzian, can I simply combine random
numbers from rnorm and rcauchy in some
2004 Sep 22
2
ordered probit and cauchit
What is the current state of the R-art for ordered probit models, and
more
esoterically is there any available R strategy for ordered cauchit
models,
i.e. ordered multinomial alternatives with a cauchy link function. MCMC
is an option, obviously, but for a univariate latent variable model
this seems
to be overkill... standard mle methods should be preferable. (??)
Googling reveals that spss
2012 Jan 19
0
Fwd: Typo in the FAQ at http://wiki.centos.org/FAQ/CentOS6, /etc/sysconfig/nertwork-scripts/ifcfg-eth0 should be /etc/sysconfig/network-scripts/ifcfg-eth0
-------- Original Message --------
Subject: Typo in the FAQ at http://wiki.centos.org/FAQ/CentOS6,
/etc/sysconfig/nertwork-scripts/ifcfg-eth0 should be
/etc/sysconfig/network-scripts/ifcfg-eth0
Date: Thu, 19 Jan 2012 15:31:08 +0100
From: Maximilian Heise <maximilian.heise at gmx.net>
To: webmaster at centos.org
Hello,
I think there is a typo in the faq at
2016 Mar 18
1
wiki update : https://wiki.centos.org/FAQ/CentOS7 : FAQ 7: ifconfig/netstat
wiki name: HavardSorli
Page for update : https://wiki.centos.org/FAQ/CentOS7
some notes / comments to:
FAQ "7. What have you done with ifconfig/netstat?"
"no longer install the net-utils package"
I am not 100% sure, but I think "net-utils" is the wrong package name.
I have checked Centos 4.9 and 7.2, ifconfig is part of the net-tools package
# rpm -ql net-tools
2016 Mar 18
0
wiki : https://wiki.centos.org/FAQ/CentOS7 : FAQ 4.: "hand-edit the configuration files" ethX alias replacement
wiki name: HavardSorli
Page for update : https://wiki.centos.org/FAQ/CentOS7
some notes / comments / open points to:
FAQ "4. .... want it to work and to hand-edit the configuration files."
My user case:
"Adding an extra ip to the same interface" in the "old days" an alias.
( I am not sure if this should be an extra faq question, or incorporated
in FAQ 4)
I have