Displaying 20 results from an estimated 4000 matches similar to: "randomizing within factors and combining unequal-sized arrays"
2002 Dec 06
2
Unequal sized three plots in a window
Dear all:
I want to divide the graphing window in to three plots such that two plots
are on the top and one at the bottom. The upper two plots are of equal sizes
that cover 50% of the Window, third plot spans the lower half portion of the
Window completely.
How do I do that, I tried layout and other options but they seem to have the
matrix options which does not solve my problem.
Any help or
2010 Oct 20
1
Please help: ANOVA with SS Type III for unequal sample sized data
Dear R experts,
I'm beginner.
My question about ANOVA for unequal sample sized data should be obsolete but
I can not clarify it.
I have a dataset from 23 males and 18 females.
I measured one condition('cond') with 4 levels.
So I'd like to see main effect of gender, cond and gender by cond
interaction and also postHoc test. (In fact, I have to do anova 90 times)
*
1. Question
2012 Oct 18
3
Linux Software RAID 1 - Unequal Sized Hard Disks
Has anyone created or rebuilt a Linux Software RAID having mirrored
partitions on unequal sized hard disks ? There is a CentOS 5 server
having two 400 GB hard disks with five mirrored partitions (software
RAID 1) and one of the hard disks is dying. Since new 400 GB HDDs are
not available here, we are exploring the possibility of replacing the
faulty hard disk with one of a higher capacity (500 GB
2009 Dec 08
1
Printing 'k' levels of factors 'n' times each, but 'n' is unequal for all levels ?
Dear List,
I need to print out each of 'k' levels of a factor 'n' times each, where
'n' is the number of elements belonging to each factor.
I know that this can normally be done using the gl() command,
but in my case, each level 'k' has an unequal number of elements.
Example with code is as below:
vc<-read.table("P:\\Transit\\CORRECT
2007 Oct 04
5
combining vectors on unequal length
If I have two vectors
X<-1:10
Y<-1:5
When I combine them using cbind, the shorter one is repeated and both are made of the same length. Is there a methods that does this without duplicating the shorter one. I want to use this to store the data back to a file.
Thanks ../Murli
[[alternative HTML version deleted]]
2011 Jul 02
5
%dopar% parallel processing experiment
dear R experts---
I am experimenting with multicore processing, so far with pretty
disappointing results. Here is my simple example:
A <- 100000
randvalues <- abs(rnorm(A))
minfn <- function( x, i ) { log(abs(x))+x^3+i/A+randvalues[i] } ?## an
arbitrary function
ARGV <- commandArgs(trailingOnly=TRUE)
if (ARGV[1] == "do-onecore") {
?library(foreach)
?discard <-
2006 Mar 18
2
extraction - subsets
Hi everybody,
let us assume i have the following matrixX and vectorY
matrixX <- runif(100)
dim(matrixX) <- c(10,10)
vectorY <- as.matrix(as.character(seq(1,10)))
if I define:
subsample<-c("2")
i can extract the rows from matriX based on the elements in vectorY which
are listed in subsample
matrixX[vectorY==subsample]
if I define subsample with more than 1 element, such
2013 Jan 18
0
repeat resampling with different subsample sizes
Hi,
I'm trying to write a code (see below) to randomly resample measurements of
one variable (say here the variable "counts" in the data frame "dat") with
different resampled subsample sizes.
The code works fine for a single resampled subsample size (in the code below
= 10).
I then tried to generalize this by writing a function with a loop, where in
each loop the function
2003 Feb 12
1
Na/NaN error in subsampling script
R-help readers,
I''m having a problem with an R script (see below), which regularly generates the error message,
Error in start:(start + (sample.length - 1)) :
NA/NaN argument
, for which I am unsure of the cause.
In essence, the script (below) generates the start and end points for random subsamples from along a vector (in reality a transect (of a given length,
2009 Oct 23
1
Bonferroni with unequal sample sizes
Hello-
I have run an ANOVA on 4 treatments with unequal sample sizes (n=9,7,10 and 10). I want to determine where my sig. differences are between treatments using a Bonferroni test, and have run the code:
pairwise.t.test(Wk16, Treatment, p.adf="bonf")
I receive an error message stating that my arguments are of unequal length:
Error in tapply(x, g, mean, na.rm = TRUE) :
2007 Jun 28
1
unequal variance assumption for lme (mixed effect model)
Dear Douglas and R-help,
Does lme assume normal distribution AND equal variance among groups
like anova() does? If it does, is there any method like unequal
variance T-test (Welch T) in lme when each group has unequal variance
in my data?
Thanks,
Shirley
2008 Apr 03
2
coding for categorical variables with unequal observations
Hi,
I am doing multiple regression, and have several X variables that are
categorical.
I read that I can use dummy or contrast codes for that, but are there
any special rules when there're unequal #observations in each groups (4
females vs 7 males in a "gender" variable)?
Also, can R generate these codes for me?
THanks.
2011 Nov 01
1
help with unequal variances
Hello,
I have some patient data for my masters thesis with three groups (n=16, 19 &
20)
I have completed compiling the results of 7 tests, for which one of these
tests the variances are unequal.
I wish to perform an ANOVA between the three groups but for the one test
with unequal variance (<0.001 by both bartlett and levene's test) I am not
sure what to do.
I thought i would run
2007 Apr 25
2
levelplot and unequal cell sizes
I am using levelplot() from lattice with grids that have unequal cell
sizes. This means that the boundary between two cells is not always
half-way between nodes, as levelplot() assumes. The result is that some
cell sizes are rendered incorrectly, which can be painfully obvious if
using relatively large cells. Is there any work-around? I am using the
conditioning capability of lattice and
2018 Apr 18
1
merge two data frame based on equal and unequal comparisons
Dear R users,
I need to merge two data frames based on both equal and unequal comparisons. The "sqldf" package used to work well , but today, I cannot resolve the following error by reinstallation of the sqldf package. Can anyone suggest a different way to perform this kind of merge function?
Thank you,
Ding
> DMRlog2pbde47DMS <- sqldf("select * from DMR_log2pbde47 as a
2011 Apr 21
1
one-way ANOVA model, with one factor, an unbalanced design and unequal variances
Hi,
i'm looking for an R function to fit a one-way ANOVA with one factor
containing 10 levels. The factor levels have different numbers of
observations (varying between 20 to 40). For most of the dependent variables
i'm testing there are unequal variances among the factor levels.
I see the function oneway.test:
oneway.test(variable ~ factor, data=dataset)
which by default does not
2011 Aug 28
1
comparing two unequal matrices without for loop?
Ein eingebundener Text mit undefiniertem Zeichensatz wurde abgetrennt.
Name: nicht verf?gbar
URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20110828/ac62948a/attachment.pl>
2013 Apr 17
1
Q-Q Plot for comparing two unequal data sets
Hello All,
Would anyone be able to help me understand how R computes a
quantile-quantile plot for comparing two data samples with unequal sample
sizes? Normally, the procedure should be to rearrange the larger data
sample into n equally-spaced parts using interpolation, where n is the
sample size of the smaller sample, and then plot the matching data pairs. I
tried using different plotting
2008 Feb 07
0
Sampling with unequal probabilities
This is in followup to a thread on R-help with subject "Sampling".
I claim that R does the wrong thing by default when
sampling with unequal probabilities without replacement -
the selection probabilities are not proportional to 'prob',
for any draw after the first: I suggest that R do what S-PLUS now does
(though you're free to choose a better implementation).
What S-PLUS
2009 Dec 22
1
Cohen's kappa, unequal score ranges
Hi,
I am having problems getting cohen's kappa to work. I have been using the function:
><-ckappa(x,y)
from the psy package.
I am trying to test for inter-observer reliability, I have 2 observers and 26 categories, however, the two observers might not necessarily have the same range of categories (I have unequal score ranges). However, I thought R could cope with this.
Each time I