Displaying 20 results from an estimated 1098 matches for "reactions".
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reaction
2009 Dec 01
1
LMER: How to specify Random Effects
I saw different specifications for Random Effects and I'm confused about
the use of "/" and the use of "(0+...|)" .
Let say we have a nested structure where some countries have some
several plants in different states and we measure the reaction to a drug.
The list of Countries = USA, France, Italy
The States for USA = Michigan, Florida, California
The States for France
2006 Nov 22
2
help
consider p as random effect with 5 levels, what is difference between these
two models?
> p5.random.p <- lmer(Y
~p+(1|p),data=p5,family=binomial,control=list(usePQL=FALSE,msV=1))
> p5.random.p1 <- lmer(Y
~1+(1|p),data=p5,family=binomial,control=list(usePQL=FALSE,msV=1))
thanks,
Aimin Yan
2006 Oct 18
1
lmer- why do AIC, BIC, loglik change?
Hi all,
I am having issues comparing models with lmer. As an example, when
I run the code below the model summaries (AIC, BIC, loglik) differ between
the summary() and anova() commands. Can anyone clear up what's wrong?
Thank you!
Darren Ward
library(lme4)
data(sleepstudy)
fm1<-lmer(Reaction ~ Days + (1|Subject), sleepstudy)
summary(fm1)
fm2<-lmer(Reaction ~ Days +
2013 Apr 25
2
Regarding Modeling - Please! QUICK HELP
I'm a student currently working with the *sleepstudy* dataset in
matrix.pkg. It deals with the reaction times of sleep deprived students
over a period of days.
I am trying to model reaction times in order to describe the variation
between students by days they havent slept.
This is what I'm running in R, but unfortunately I'm missing something:
> logmod11 <-
2010 Feb 20
1
Contingency Table - output to odfWeave not working for matrix
Hi guys I'm hoping someone can help me with this. It should be easy but it seems to get stuck for no obvious reason! I am trying to set a report up in odfWeave so that we can re-run the same analysis at 3 time points as the data matures and provide an 'instant' report.
To simplify the situation we have two pieces of data: site_id (numerical value 1-9) and reaction (categorical Y or
2007 Jul 22
4
using R for a reaction-time experiment
I want to use R to run a reaction-time experiment: Something appears on the
screen, I respond by typing something (one keystroke), the system measures
the speed of my response. R would be great for this if only I didn't have to
hit Enter to enter that keystroke. I am doing such experiments now but they
require two actions per trial: hit keystroke, hit Enter.
Is there some way that R can be
2008 Mar 07
1
Re action Time and Time Series Analysis
Dear,
I need to analyse reaction time.
The general idea might be described as this: There are 8x8 circles. My
program light a circle at one time. The subject then click the lighted
circled as fast as possible. After the correct circle is clicked, then the
next circle will be lighted for the subject to click on, and so on.
My questions are:
1. May I use Time Series Analysis? I read that Time
2008 Mar 26
1
generating a paired t-test with multiple levels of a factor
I have been trying to run this analysis and finally want to ask for help.
I am trying to run a paired t-test in which I have 19 subjects who have
reaction times for 5 different conditions. The data frame has 114 rows
total (6 rows for each subject representing six average reaction times by
condition). Is there a way to run all paired t-tests where a paired t-test
is run for every possible
2008 Aug 20
3
bug in lme4?
Dear all,
I found a problem with 'lme4'. Basically, once you load the package 'aod' (Analysis of Overdispersed Data), the functions 'lmer' and 'glmer' don't work anymore:
library(lme4)
(fm1 <- lmer(Reaction ~ Days + (Days|Subject), sleepstudy))
(gm1 <- glmer(cbind(incidence, size - incidence) ~ period + (1 | herd),
family = binomial, data
2013 Aug 28
1
named lmer.models in do.call(anova,models)
Hi,
For some reason do.call on anova fails if the models are named lmer objects.
Consider the following example:
library(lme4)
models <- list(
lmer(Reaction ~ Days + (1| Subject), sleepstudy),
lmer(Reaction ~ Days + (Days | Subject), sleepstudy))
#
# models is an unnamed list, do.call works (although with warning):
do.call(anova, models)
#
# after labeling the models, do.call gives an
2012 Jul 08
2
Extracting arithmetic mean for specific values from multiple .txt-files
Hello,
I'm coming straight to the point:
I have 65 .txt-Files named "XYZ_1.txt" to "XYZ_65.txt" (each number
represents a test subject).
I have to open them in Microsoft Excel to see the exact structure.
In each of those .txt-files there are reaction time values (in milliseconds)
from line 15, column H to line 166, column H for each test subject (and a
couple of other
2018 Jun 18
5
Bug-closing protocol
Hi all,
First of all, I'm sorry to create a separate thread on the mailing list, I
have disabled all mails from it.
I just read the thread about the bug closing protocol thanks to LLVMWeekly.
(http://lists.llvm.org/pipermail/llvm-dev/2018-June/123955.html)
I've noticed a lot of reactions from people involved with the solving part
of the bugs. So I'm putting out the loggers point of view. (Or at least
mine)
I'm totally in favor of getting relevant information when a bug gets
closed. Over the last couple of years, I've logged several bugs, of which a
couple of clang-cl c...
2016 Sep 05
3
11.0 stuck on high network load
On 09/05/16 at 12:57P, Slawa Olhovchenkov wrote:
> I am try using 11.0 on Dual E5-2620 (no X2APIC).
> Under high network load and may be addtional conditional system go to
> unresponsible state -- no reaction to network and console (USB IPMI
> emulation). INVARIANTS give to high overhad. Is this exist some way to
> debug this?
Can you panic it from console to get to db> to get
2010 Jul 16
1
Creating symbolic expressions in R
...h aren't really important) to structure a vector
of rate equation which will be passed into an ODE function and solved
with associated functions from 'deSolve.' Roughly what this entails
is scanning through a very large stoichiometric matrix containing
integers which map metabolites to reactions and then assembling a
series of monomials that describe the rates of the reactions. I'm
running into trouble because R does not like doing numerical
operations on characters, but I need the rate to be in symbolic form.
Below I've described an example.
The input is a matrix like this one,...
2006 Sep 07
5
Conservative "ANOVA tables" in lmer
Dear lmer-ers,
My thanks for all of you who are sharing your trials and tribulations
publicly.
I was hoping to elicit some feedback on my thoughts on denominator
degrees of freedom for F ratios in mixed models. These thoughts and
practices result from my reading of previous postings by Doug Bates
and others.
- I start by assuming that the appropriate denominator degrees lies
between n
2010 Nov 01
3
Mean and individual growth curve trajectories
I'm trying to understand how to plot individual growth curve trajectories,
with the overall mean trajectory superimposed (preferably in a slightly
thicker line, maybe in black) over the individual trajectories. Using the
sleepstudy data in lme4, here is the code I have so far:
library(lme4)
library(lattice)
xyplot(Reaction ~ Days, data = sleepstudy, group = Subject, type = 'l')
2010 Feb 08
2
question about multi ups monitoring and reactions with nut
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Hash: SHA1
Hello everybody,
I have a Debian network server doing monitoring for three UPS devices.
> MONITOR r3000xr at localhost 1 monuser xxxxxxxxxx master
> MONITOR apcups01 at localhost 1 monuser xxxxxxxxx monitor-only
> MONITOR apcups02 at localhost 1 monuser xxxxxxxxx monitor-only
I want nut to send an email to root for every changes nut
2011 Nov 29
0
Single Variable mlogit formatting
...ession on my data, and have been unsuccessful
so far. The data I am working with consist of many observations of how
people react when given a certain number. I have just 2 data points per
observation: a number (there are ~300 different possible numbers) and then a
reaction (either 0, 1, or 2). The reactions are mutually exclusive and
exhaustive.
I am trying to devise models that can estimate the probability of the
reactions given the number. However, I don't seem to be able to run the
mlogit command on my data (mlogit.data() works fine). I've read through much
of the mlogit tutorial pdf and t...
2003 Oct 29
0
Different SAMBA reaction about file permissions
How come am I not able to delete this "aquila_test/toto2" file from our
"data" (see smb.conf below) directory but can delete it (different copy but
same permissions and owners/groups) from our "home" (see smb.conf below)
directory from a "Windows 2000" PC using samba ( we don`t have this
problem when doing unix commands)
File is on a SUN SunOS 5.8 server
2007 Jan 30
0
No reaction from memcached
I''ve been following the instructions here http://nubyonrails.com/
articles/read/716 on how to get started with memcached.
Starting up ./script/console production I get at couple of deprecation
warnings:
<snip>
./script/console production
Loading production environment.
DEPRECATION WARNING: model is deprecated and will be removed from
Rails 2.0 See