Displaying 20 results from an estimated 9000 matches similar to: "random section of samples based on group membership"
2016 May 25
1
Slow RAID Check/high %iowait during check after updgrade from CentOS 6.5 -> CentOS 7.2
On 2016-05-25 19:13, Kelly Lesperance wrote:
> Hdparm didn?t get far:
>
> [root at r1k1 ~] # hdparm -tT /dev/sda
>
> /dev/sda:
> Timing cached reads: Alarm clock
> [root at r1k1 ~] #
Hi Kelly,
Try running 'iostat -xdmc 1'. Look for a single drive that has
substantially greater await than ~10msec. If all the drives
except one are taking 6-8msec, but one is very
2009 Dec 12
4
simple ts.plot question
*Respected Sir,
I have a simple question regarding plots of time series in R.
I have to plot "conc" against "time" **for each individual and display in
the same panel for the in-built dataset "Indometh" in R.
*
***I have six time series, say subject1.ts, subject2.ts, .............,
subject6.ts.
The observations are taken at an interval of 0.25 hr.
All of the series
2008 Nov 14
1
Superimposing y-variables in Lattice formulas
Given a data frame of a categorical variable and two continuous
variables, I would like to display one continuous variable against the
other for each value of the categorical variable, all superimposed on
the same plot. For example:
data(Indometh); str(Indometh)
Classes 'nfnGroupedData', 'nfGroupedData', 'groupedData' and
'data.frame': 66 obs. of 3
2008 Apr 30
2
Summary statistics across factor levels
R users,
I intention is to calculate some summary statistics across factor
levels. I know that in Hmisc package there is a summary function which
produces neat summary statistics when using "cross" option. I would
like to produce similar output with N and Missing columns but produce
a data.frame. Is there any built-in function for that?
#example data
install.packages("Hmisc")
2001 Dec 27
3
reshape error in 1.4 (PR#1231)
Full_Name: Kevin Wright
Version: 1.4
OS: Windows 95
Submission from: (NULL) (170.54.59.160)
Note: This was the 1.4 build for Windows that Brian Ripley made available.
The first example in the help for reshape doesn't work for me. When I cut and
paste, this is what happens:
> data(Indometh,package="nls")
> summary(Indometh)
Subject time conc
2007 May 11
3
A simple question regarding plot of nls objects
Hi,
I was trying to run the example of Indomethacin kinetics from the book:
## From Pinheiro/Bates, Mixed-Effects-Models in S and S-Plus,
## Springer, Second Printing 2001, Section 6.2
library(nlme)
plot(Indometh)
fm1Indom.nls <- nls(conc~SSbiexp(time,A1,lrc1,A2,lrc2), data=Indometh)
summary(fm1Indom.nls)
plot(fm1Indom.nls,Subject~resid(.),abline=0)
## ....
the last plot command gives me the
2001 May 23
2
help: exponential fit?
Hi there,
I'm quite new to R (and statistics),
and I like it (both)!
But I'm a bit lost in all these packages,
so could someone please give me a hint
whether there exists a package for fitting
exponential curves (of the type
t --> \sum_i a_i \exp( - b_i t))
on a noisy signal?
In fact monoexponential decay + polynomial growth
is what I'd like to try.
Thanks in advance,
2008 Nov 18
1
reshape question
Hi,
It's probably a simple issue but I'm struggling with that. I'll use the
example shown in the help page.
head(Indometh)
wide <- reshape(Indometh, v.names="conc", idvar="Subject",
timevar="time", direction="wide")
head(wide)
reshape(wide, idvar="Subject", varying=list(2:12),
v.names="conc",
2011 Jun 01
1
xtable with conditional formatting using \textcolor
Hello list,
I'm doing a table with scores and I want include colors to represent status
of an individual. I'm using sweave <<results=tex>>= and xtable but I can't
get a result I want. My attemps are
#-----------------------------------------------------------------------------
# code R
da <- data.frame(id=letters[1:5], score=1:5*2)
col <- function(x){
2005 Jun 15
1
anova.lme error
Hi,
I am working with R version 2.1.0, and I seem to have run into what looks
like a bug. I get the same error message when I run R on Windows as well as
when I run it on Linux.
When I call anova to do a LR test from inside a function, I get an error.
The same call works outside of a function. It appears to not find the right
environment when called from inside a function. I have provided
2005 Jun 24
9
R demos
Hi All,
I am currently preparing some form of slideshow introducing R and its
capabilities for some colleagues. The thing will be about 30 mins, and
I'd like to have some "pretty pictures" and some "amazing facts" (I'm
trying to sell, obviously :)).
Can I ask if it's possible to easily retrieve a gross figure of the
number of functions in R considering the
2020 Oct 12
1
samba AD problem after re-join domain
On 12/10/2020 16:11, Jason Keltz wrote:
>
>> Hi Rowland,
>>
>> I did not leave the domain, but I did delete the entry by either the
>> Windows AD tool or "samba-tool computer delete" option.? I can't
>> remember which one at this point.? I think that clears up all the
>> bits.? Is that correct?? On the local host, I also deleted the
>>
2011 Mar 11
5
How to calculate means for multiple variables in samples with different sizes
Hello R-helpers:
I have data like this:
sample replicate height weight age
A 1.00 12.0 0.64 6.00
A 2.00 12.2 0.38 6.00
A 3.00 12.4 0.49 6.00
B 1.00 12.7 0.65 4.00
B 2.00 12.8 0.78 5.00
C 1.00 11.9 0.45 6.00
C 2.00 11.84 0.44 2.00
C 3.00 11.43 0.32 3.00
C 4.00 10.24 0.84 4.00
D
2004 Apr 28
3
Possible bug in foreign library import of Stata datasets
Concerning this article, Christopher Zorn, "Generalized Estimating
Equation Models for Correlated Data: A Review with Applications." 2001.
American Journal of Political Science 45(April):470-90.
The author very kindly provides data for replication on his web page:
http://www.emory.edu/POLS/zorn/Data/GEE.zip.
I've been comparing the Professor Zorn's results obtained with
2012 Sep 28
2
Converting array to matrix
Hi,
I have a 3d array as below, I want to make this array to a matrix of p=50(rows) and n=20(columns) with the coverage values .
The code before the array is:
library(binom)
Loading required package: lattice
pi.seq<-seq(from = 0.01, to = 0.5, by = 0.01)
no.seq<-seq(from = 5, to = 100, by = 5)
cp.all = binom.coverage( p = pi.seq, n = no.seq , conf.level = 0.95, method = "exact")
2009 Nov 13
2
linear model and by()
Hello R list,
This is a question for anyone who has used the by() command. I would like to
perform a regression on a data frame by several factors. Using by() I think
that I have able to perform this using the following:
> lm.r <- by(master, list(Sectionf=Sectionf, startd=startd), function(x) lm
(tot.c ~ starttime, data = x))
So that is, I would like to perform separate regressions for
2007 Sep 18
10
Routes
hi all,
I want to move some routing tasks out of the router and into the
controller. The goal is to make Merb feel less like mod_rewrite and
give the user more control at the controller. The new Router is
simple: it takes the path_info (not the whole request) then outputs a
controller class and some parameters from the path matching. The rest
of the routing would be done at the controller level.
2009 Jun 16
4
confusion on levels() function, and how to assign a wanted order to factor levels, intentionally?
Dear R-helpers,
I want to make a series of boxplots on several numeric univariates with two
group variables (species and population, population nested in species, and
with population as the X-axis). In order to get a proper order of the
individual populations in X-axis, I need to assign a wanted order to the
factor (population). I used the levels() function to do this assignment, but
it seemed
2005 Jan 06
1
nls - convergence problem
Dear list,
I do have a problem with nls. I use the following data:
>test
time conc dose
0.50 5.40 1
0.75 11.10 1
1.00 8.40 1
1.25 13.80 1
1.50 15.50 1
1.75 18.00 1
2.00 17.00 1
2.50 13.90 1
3.00 11.20 1
3.50 9.90 1
4.00 4.70 1
5.00 5.00 1
6.00 1.90 1
7.00 1.90 1
9.00 1.10 1
12.00 0.95 1
14.00
2007 Aug 22
5
Slow concurrent actions on the same LVM logical volume
Hi 2 all !
I have problems with concurrent filesystem actions on a ocfs2
filesystem which is mounted by 2 nodes. OS=RH5ES and OCFS2=1.2.6
F.e.: If I have a LV called testlv which is mounted on /mnt on both
servers and I do a "dd if=/dev/zero of=/mnt/test.a bs=1024
count=1000000" on server 1 and do at the same time a du -hs
/mnt/test.a it takes about 5 seconds for du -hs to execute:
270M