Displaying 20 results from an estimated 8000 matches similar to: "aov() and NaN"
2002 Oct 29
4
sourcing the content of directories
hi,
is there a way to source all R-files that reside in a given directory
with a single R-call ?
greetinx jan
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2002 Jul 05
1
balance in AoV (was aov() and NaN)
<ripley at stats.ox.ac.uk> wrote:
> Hint 2: in the absence of balance, ...., and lme can do that
Would it be possible to make aov like wrappers to the various special lm variants
allowing for a uniform syntax for anova?
aov(resp~f1*f2+Error(S/(f1*f2))) ## uses lm
aov.lme(resp~f1*f2+Error(S/(f1*f2))) ## uses lme
aov.rlm(resp~f1*f2+Error(S/(f1*f2))) ## uses rlm
...
I'd do it, but I
2008 Dec 17
1
repeated measures aov with weights
Dear R-help,
I'm facing a problem with defining a repeated measures anova with
weighted data.
Here's the code to reproduce the problem:
# generate some data
seed=11
rtrep <- data.frame(rt=rnorm(100),ti=rep(1:5,20),subj=gl
(20,5,100),we=runif(100))
# model with within factor for subjects/repeated measurements, no
problem
aov(rt~ti + Error(subj/ti),data=rtrep)
#model with weights
2002 Oct 29
5
unix environment variables under R
hi,
i am working on a little R-project with a couple od other guys.we use
CVS, but everyone keeps the R-source files in different locations in his
home-directory. of course this causes trouble when sourcing R-files. i
thought a UNIX environment variable could be the solution, but R doesn't
seem to know about the environment variables.
e.g. >> source("$PROJECT/xxx.R")
2002 May 14
2
least summed square distance + fit
hi,
I have a matrix (representing original data) that looks e.g. like this
(consider it beeing x,y,z coords):
441 447 0
265 407 0
374 223 0
288 574 0
669 309 0
591 195 0
595 475 0
424 351 0
I get a second matrix (subject data) that is similiar to the above
matrix but it is scaled, translated and rotated (and of course a little
inprecise).
Also I have an
2000 Jul 05
1
Tukey.aov with split-plot designs
I am using R 1.1 with Redhat 6.2 and RW 1.001 with Win98 (the upkey doesn't
work on my IBM either as has been previously reported by others).
The function aov doesn't return either the residuals or the residual
degrees of freedom for split-plot designs.
If you use the following code from Baron and Li's "Notes on the use of R
for psycology experiments and questionnaires"
2005 Oct 27
1
aov() and lme()
Sorry for reposting, but even after extensive search I still did not
find any answers.
using:
summary(aov(pointErrorAbs~noOfSegments*turnAngle+Error(subj/(noOfSegments+turnAngle)),
data=anovaAllData ))
with subj being a random factor and noOfSegments and turnAngle being
fixed factors, I get the following results:
----------------------------------------------
Error: subj
Df Sum
2002 Aug 20
2
t() converts data.frames ind matrix
hi,
i just recognized that the t() function converts a data frames into a
matrix (R 1.5). is that a bug or a feature ?
greetinx jan
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r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the
2001 Dec 23
1
aov for mixed model (fixed and random)?
I'm starting to understand fixed and random effects, but I'm
puzzled a bit. Here is an example from Hays's textbook (which is
great at explaining fixed vs. random effects, at least to dummies
like me), from the section on mixed models. You need
library(nlme) in order to run it.
------
task <- gl(3,2,36) # Three tasks, a fixed effect.
subj <- gl(6,6,36) # Six subjects, a random
2006 Aug 03
3
between-within anova: aov and lme
I have 2 questions on ANOVA with 1 between subjects factor and 2 within factors.
1. I am confused on how to do the analysis with aov because I have seen two examples
on the web with different solutions.
a) Jon Baron (http://www.psych.upenn.edu/~baron/rpsych/rpsych.html) does
6.8.5 Example 5: Stevens pp. 468 - 474 (one between, two within)
between: gp
within: drug, dose
aov(effect ~ gp * drug *
2004 Mar 02
1
possible bug in aov?
Hi, I'm interested in doing a repeated measures anova using aov. The procedure is nicely described in section 6.7.1, pp. 24-27 of Baron and Li's "Notes on the use of R for psychology experiments and
questionnaires," and I've reproduced their example exactly.
My own problem is almost identical to theirs:
rawdat<-c(1.6530074e+001, 1.2124254e+001, 1.0040371e+001,
2006 Aug 05
1
Interpretation of call to aov()
Hi all,
I've been reading about aov() at
http://www.psych.upenn.edu/~baron/rpsych/rpsych.html and
http://davidmlane.com/hyperstat/intro_ANOVA.html and
I try to use this test in experiments with my simulator.
What I would like Anova to tell me is whether the differences I see
when plotting the means of performance per method are significant.
And also, whether this is dependent on the problem
2004 Jul 16
1
Fixed and random factors in aov()
Hi,
I'm confused about how to specify random and fixed factors in an aov()
term. I tried to reproduce a textbook example: One fixed factor (Game, 4
levels) and one random factor (Store, 12 levels), response is Points.
The random factor Store is nested in Game. I tried
> str(kh.df)
`data.frame': 48 obs. of 4 variables:
$ Subj : Factor w/ 48 levels
2011 Jan 24
2
normality and equal variance testing
I currently have a program that automates 2-way ANOVA on a series of endpoints,
but before the ANOVA is carried out I want the code to test the assumptions of
normality and equal variance and report along with each anova result in the
output file. How can I do this?
I have pasted below the code that I currently use.
library(car)
numFiles = x #
2006 Apr 20
1
aov contrasts residual error calculation
Hi,
I am using aov with an Error component to model some repeated measures data.
By repeated measures I mean the data look something like this...
subj A B C
1 4 11 15
2 3 12 17
3 5 9 14
4 6 10 18
For each subject I have 3 observations, one in each of three conditions (A,
B, C). I want to test the
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
2003 Mar 22
1
extracting the names of the dataframe and variables in aov or lm
Dear R Users,
I want to write a function that applies to the dataframe and variables
that were used in a previous call to lm or aov. In order to do this, I
need to write a function that applies to the output of lm or aov, and
yields the names of the dataframe and variables that were used in the lm
or aov analysis.
For example, suppose that I give the command:
aov.out <- aov( Rt ~
2008 Nov 26
1
S4 slot containing either aov or NULL
Dear listmembers,
I would like to define a class with a slot that takes either an object
of class aov or NULL. I have been reading "S4 Classes in 15 pages more
or less" and "Lecture: S4 classes and methods"
#First I tried with list and NULL
setClass(listOrNULL")
setIs("list", "listOrNULL")
setIs("NULL", "listOrNULL")
#doesn't
2008 Oct 29
2
how to get the value of aov summary into another variable
Hi,
I have a question of aov. e.g.
aov.ex = aov(x~y)
summary(aov.ex)
The aov summary will print to the screen. How can I extract the aov
result, in particular the values of Pr(>F) and F value into a vector
so that I can use them for other use?
Thanks.
--
Waverley @ Palo Alto
2010 Jan 09
2
aov function syntax
Hello,
I have a simple question about using the aov function syntax (ie. * + or :)
for the interaction of 2 factors. I have read the help files, and researched
other sites, and have included my source files. My goal is to measure the
signifigance of the interaction between population and condition (aka.
population:condition). I can't seem to figure it out.
1. In the first example the