Displaying 20 results from an estimated 200 matches similar to: "Linear mixed effects models"
2003 Dec 17
1
repeated measures aov problem
Hi all,
I have a strange problem and rigth now I can't figure out a
solution.
Trying to calculate an ANOVA with one between subject factor (group)
and one within (hemisphere). My dependent variable is source
localization (data). My N = 25.
My data.frame looks like this:
> ML.dist.stack
subj group hemisphere data
1 1 tin left 0.7460840
2 2 tin left
2008 Nov 08
1
Clustering and functions
I am new to R and have written a function that clusters on subsets of a big data data set with 60,000 points. I am not sure why, but I keep getting a run-time error. Any suggestions would be greatly appreciated.
Here is the code:
library(cba)
d<-read.csv("data.csv", header=TRUE)
v<-c(53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,21,72 73,74,75,76,77,78)
2007 May 23
1
I made some progress on my previous "systemfit" question but still not quite there
Surprisingly, I played around with some test code and below actually
creates equations that look correct.
tempmat<-matrix(10,nrow=6,ncol=6)
restrictmat<-diag(6)
colnames(tempmat)<-c("AUD.l1","CHF.l1","CAD.l1","GBP.l1","EUR.l1","JPY.l
1")
2006 Apr 19
1
Probable Numeric Bugs in svd function (PR#8781)
Hello,=0D
=0D
I just noticed that the "svd" function does not work properly for some=0D
sparse matrices.=0D
When I replace the 0 by very small noises (let's say 10^-16), it then=0D
works.=0D
The test I've performed is to compared the singular values to the eigen=0D
values (as I work with squarred matrices).=0D
=0D
Here is the code (I may be wrong!):=0D
=0D
2004 Jul 21
2
Rose Diagrams
Hi,
Is it possible to create Rose Diagrams of wind data (speed & direction) with
R??
Best regards,
Lars Peters
-----
Lars Peters
University of Konstanz
Limnological Institute
D-78457 Konstanz
Germany
phone: +49 (0)7531 88-2930
fax: +49 (0)7531 88-3533
e-mail: Lars.Peters@Uni-Konstanz.de
web: Lars Peters
<http://www.uni-konstanz.de/sfb454/tp_eng/A1/doc/peters/peters.html>
2004 Jul 09
1
Mixed model ANOVA with a nested design
Dear all,
I've got a big problem. I try to analyse my data using R with a mixed model
ANOVA without useful results and success.
My data are as follows:
3 factors (Treatment, Site, Subsite) with 'Subsite' as random factor and
nested into 'Site'.
I want to analyse the effects of the three main effects (factorial design to
a specified degrees (2)) with the interactions between
2003 Dec 03
1
Changing Colors
Hello,
I've got a big problem. I'm using R for geostatistical analyses, especially
the field-package.
I try to generate plots after the kriging process with help of
image.plot(..., col=terrain.colors, ...). Everything works fine, but I want
to reverse the color-palettes (heat.colors, topo.colors or gray()) to get
darkest colors at highest data-values instead the other way round.
Could
2006 Jul 31
1
add'l info: x86_64 reproducible server PANIC with latest kernel
I forgot to mention that the problem has nothing to do with the kernel
being tainted (due to VMware server).
I installed VMware server after being faced with the crashes, to give
the Java user a "sandbox" which s/he could crash without taking down the
real server. Only then I discovered that VMware server has a memory
limitation to 3600MB (I guess because it's not a 64bit
2005 Dec 02
1
covariance structures in lmer
Hi,
I usually use lme from the nlme library. Now I have read an article about
lmer in Rnews and lmer seemed to me more comfortable to use. Unfortunately,
I didn't find out how to use covariance structures (e. g. corSymm(),
corAR1()). Is there a way to use them similarly as in lme ? Is it
implemented ? If somebody knows, please let me know.
Thank you very much in advance,
Stephan
2004 Jul 23
0
problem lme using corSymm()
Hi,
I got a computational problem with lme (nlme library R 1.9.1) using
corSymm(). Here is the data:
[,1] [,2] [,3] [,4] [,5] [,6]
[1,] 0.19639793 0.09127954 0.11733288 0.07598273 0.06545106 0.06211532
[2,] 0.22773467 0.10981912 0.16052847 0.38101187 0.18353474 0.24072918
[3,] 0.46743388 0.45733836 0.32191178 0.43356107 0.39159746 0.53984221
[4,]
2004 Jul 30
1
lme: problems with corARMA
Trying following example from Pinheiro and Bates in order to fit an
ARMA(1,1) model:
library(nlme)
fm1Ovary.lme<-lme(follicles~sin(2*pi*Time)+cos(*pi*Time),data=Ovary,random=p
dDiag(~sin(2*pi*Time)))
fm5Ovary.lme<-update(fm1Ovary.lme,corr=corARMA(p=1,q=1))
I get follwing error message:
Error in "coef<-.corARMA"(`*tmp*`, value = c(62.3428455941166,
62.3428517930051 :
2006 Jul 31
1
x86_64 reproducible server PANIC with latest kernel
Our Tyan VX50 server, which is otherwise stable, can be crashed by a
specific user who starts a Java application.
Relevant facts are:
x86_64 CentOS 4.3 fully updated (but otherwise default config)
8 Dual-Core Opteron 870 (2 GHz), giving 16 cores
32 GB memory (running at DDR333)
The panic is reproducible within a couple of minutes.
I tried the 2.6.9-42 largesmp kernel from J.Baron's website
2004 Jun 11
1
comparing regression slopes
Dear List,
I used rlm to calculate two regression models for two data sets (rlm
due to two outlying values in one of the data sets). Now I want to
compare the two regression slopes. I came across some R-code of Spencer
Graves in reply to a similar problem:
http://www.mail-archive.com/r-help at stat.math.ethz.ch/msg06666.html
The code was:
> df1 <- data.frame(x=1:10, y=1:10+rnorm(10))
2000 Feb 02
1
Bugreport: OpenSSH-1.2.2 Server for Linux (glibc 2.1.2)
Hi,
I would like to report a bug in OpenSSH-1.2.2 (release) under Linux.
Under certain conditions the sshd client process segfaults while doing
the password authentification. I have observed the behaviour with
glibc 2.0.7 (non-PAM), glibc 2.1.1 (PAM) and glibc 2.1.2 (PAM), when
'RhostsRSAAuthentication yes' is chosen in sshd_config. It appears to
happen regardless whether PAM is used or
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
2004 May 10
2
trellis plot problem with R-1.9.0-1
I tried following commands:
amp~time|subject/trial #this was the grouping structure of the data
plot(dip,inner=~condition,layout=c(2,2))
after the plot command I obtained this error message:
Error in if(!any(cond.max.level - cond.current.level <0)&&(row-1)* :
missing value where TRUE/FALSE needed
This error only occured in compination with "layout". It was no
2006 Mar 19
1
Extracting numerical vectors from an array - use of multhist (plotrix)
Dear R community members,
I am very new to R, so I hope I didnĀ“t oversee the answer to my question
in the manuals and faqs.
I am trying to create a histogram containing several data sets (I would
like to see how the dependent variable is distributed for the different
groups). This should be possible using the function multhist contained
in the plotrix package. (I am using R 2.2.1, in windows XP).
2000 Feb 04
0
Patch that allows equal sign in options
Hi,
Here is a patch for release 1.2.2 that allows the use of '=' instead
of whitespace when specifying options. For options on the commandline,
it can be useful to be able to avoid whitespace in some situations.
best regards and thanks for the patch regarding segfaulting with PAM,
Stefan
-------------------------------------------------------------------
Email: Stefan.Heinrichs at
2009 Nov 22
1
Metaplot Axis Annotation
Hello,
We are looking to adjust the font size of the axis annotation on the graph
that results from use of the metaplot() function. Metaplot seems to respond
to cex and cex.lab to change those graphical parameters, but it doesn't
respond to cex.axis. Is there a way to work around this by creating a
customized x-axis, and if so, how?
Thanks for all your help. Syntax is below.
Best,
Dawn
2004 Jun 21
6
Visual stimulus presentation using R?
Dear all!
Although the Psycho-Toolbox for Matlab is free software, Matlab isn't.
I'm planning to do an experiment where it's essentail to travel to the
subjects, not let the subjects come to where the Matlab licences are
:-(
So I need to use a free software for my experiment if I don't want to
by an extra Matlab licence (which I don't want to).
Did anyone ever try to do