Displaying 20 results from an estimated 1000 matches similar to: "Tukey's one degree of freedom for nonadditivity?"
2007 Dec 07
5
Grouping by interval
Hello,
I have a dataframe of say 20 lines with one line per individual. I want to group these 20 individuals
by length class (eg. of 5cm) and get the mean value of all the other variables (eg VarA and VarB) for each length class
My dataframe is as follow:
Length <- 10:30
VarA <- seq(1000,1200,10)
VarB <- seq(500,700,10)
Data <- cbind(Length,VarA,VarB)
And I want to get something
2011 Sep 12
2
Automated generation of combinations
Hello,
I'd like to generate automatically all the possible combinations of a set of 8 variables (there are 535, too many to do it by hand). For example:
input: varA, varB, varC
output: varA+varB+varC
varA+varB
varA+varC
varB+varC
varA
varB
varC
Is there any function that produces this option?
Thank you
[[alternative
2011 May 05
3
cross-correlation table with subscript or superscript to indicate significant differences
Hi, I wonder whether the following is possible with R, and whether anyone has done that and can share his/her code with me. I have a correlation matrix, and I want to create a correlation table that I can copy to Microsoft Word with a superscript above each correlation, indicating significant differences in the same row. That is, when correlations in the same row do not share superscript, it means
2008 Mar 16
2
How to loop through all the columns in dataframe
Hi:
Can anyone advice me on how to loop and perform a
calculation through all the columns.
here's my data
xd<-
c(2.2024,2.4216,1.4672,1.4817,1.4957,1.4431,1.5676)
pd<-
c(0.017046,0.018504,0.012157,0.012253,0.012348,0.011997,0.012825)
td<- c(160524,163565,143973,111956,89677,95269,81558)
mydf<-data.frame(xd,pd,td)
trans<-t(mydf)
trans
I have these values that I need to
2012 Jan 01
1
How to pass in a list of variables as an argument to a function?
Hello,
I have some code that currently works fine and I am endeavoring to
convert the major pieces of it into functions.
This involves taking "hard coded" names of variables that are used in
various places and figuring out how to
abstract them out into functions where the arguments (i.e. a list of
variables)?can be passed to the parent function
and used within that function for various
2011 Aug 03
1
Coefficient names when using lm() with contrasts
Dear R Users,
Am using lm() with contrasts as below. If I skip the contrasts()
statement, I get the coefficient names to be
> names(results$coef)
[1] "(Intercept)" "VarAcat" "VarArat" "VarB"
which are much more meaningful than ones based on integers.
Can anyone tell me how to get R to keep the coefficient names based on the
factor levels
2006 Aug 15
3
merge 2 data frame based on more than 2 variables
Dear Lister,
I understand merge() can be used to join 2 data frames based on 1 variable.
But how about merge based on more than 2 variables?
Thank you so much!
--
WenSui Liu
(http://spaces.msn.com/statcompute/blog)
Senior Decision Support Analyst
Health Policy and Clinical Effectiveness
Cincinnati Children Hospital Medical Center
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2007 Mar 16
1
multiple scores per subject
Hi,
I have a data set that looks like this:
> data
vara varb S PC
1 None 250 1 80
2 None 250 1 70
3 Some 250 1 60
4 Some 250 1 70
5 None 1000 1 90
6 None 1000 1 90
7 Some 1000 1 80
8 Some 1000 1 70
9 None 250 2 100
10 None 250 2 80
11 Some 250 2 70
12 Some 250 2 70
13 None 1000 2 100
14 None 1000 2 90
15 Some 1000 2 50
16 Some 1000 2 40
...
And so on.
2004 Dec 21
3
R code for var-cov matrix given variances and correlations
Dear list members,
Where can I find code for computing the p*p variance-covariance
matrix given a vector of p variances (ordered varA, varB, ...,
varp) and a vector of all possible correlations (ordered corAB,
corAC, ..., corp-1,p)?
I know that the covariance between 2 variables is equal to the
product of their correlation and their standard deviations:
corAB * varA^.5 * varB^.5
and so:
2004 Nov 01
1
plot time series / dates (basic)
Dear R users,
I'm having a hard time with some very simple things. I have a time
series where the dates are in the format 7-Oct-04. I imported the
file with read.csv so the date column is a factor. The series is
rather long and I want to plot it piece by piece. The function below
works fine, except that the labels for date are meaningless (ie
9.47e+08 or 1098000000 - apparently the number of
2007 Nov 07
2
creating a dynamic output vector
Let's say I have a program that returns variables whose names may be any
string within the vector
NAMES=c("varA","varB","varC","varD","varE","varF"..."varZ"), but I do
not ever know which ones have actually been created. So in one example
output, "varA", "varC", and "varD" could exist, but
2012 Jul 18
1
fitting several lme sistematically
Dear R-list,
I have a data set (in the following example called "a") which have:
one "subject indicator" variable (called "id")
three dependent variables (varD, varE, var F)
three independent variables (varA, varB, varC)
I want to fit 9 lme models, one per posible combination (DA, DB, DC, EA, EB, EC, FA, FB, FC).
In stead of writting the 9 lme models, I want to
2005 Apr 07
2
newline in lattice axis label
Hi,
I have a 3 panel xyplot with different variables in the y axis. I'm trying
to insert a newline after "Width (cm)," in the ylab argument as in the
example below. My goal is to have the y axis label broken into two lines,
split after the string just mentioned.
plotfun <- function() {
fakedf <- data.frame(A = sample(1:100, 50),
B = rnorm(50),
2014 Oct 17
5
[LLVMdev] Performance regression on ARM
> Chandler’s complex arithmetic changes are also in the range: r219557 in clang. We saw it change the code in mandel-2 significantly.
mandel-2 is broken on hard FP ABI systems, btw. The reason is simply:
we're emitting a call to __muldc3 with AAPCS VFP calling convention,
however, the function expects softfp (AAPCS) calling conv and reads
garbage from GP registers.
I'm working on fix.
2013 Dec 03
1
[LLVMdev] Failures on clang-mergefunc-x86_64-freeBSD9.2
Hi all,
We have 4 outstanding tests on clang-mergefunc-x86_64-freeBSD9.2 builder.
I have introduced issues for them in bugzilla:
http://llvm.org/bugs/show_bug.cgi?id=18089
http://llvm.org/bugs/show_bug.cgi?id=18056
Since we have opened issues for these tests, can we add them to
ignore-list for this builder? It allows faster catch and fix other
failures (if we get them).
I also wandering, may be
2010 Jun 17
1
Problems using allEffects() (package effect)
Dear R users,
I have some trouble using the allEffects() function to compute and
display effect plots for a linear model.
My data is quite simple, it concerns effects of 3 treatments on the
tumoral volume of mice. vTum codes for the qualitative initial volume,
from small to big, temps is the time in month since beginning of
treatment, and S?rie codes for the batch. Data is unbalanced.
>
2007 Nov 19
2
[LLVMdev] LLVM builds on x86-64 Solaris
Hey everyone,
Not sure if anyone had tried this but I managed to get LLVM and clang to
build on Nexenta Alpha 7. This is an OpenSolaris/GNU OS.
There wasn't much to change for LLVM, except "#undef"ing a lot of x86
register name equivalents and the like (ie. EAX,ESP,CS,FS...).
There were a couple of similar undef's needed for clang, as well. The
clang testsuite ran fine except
2010 Feb 15
1
Adjusted means and generalized chain block designs
Dear Colleagues,
John Mandel ( Chain block designs with two-way elimination of heterogeneity.
Biometrics 10, 251-272 ,1954).
extended the class of chain block designs (Youden & Conner (1953)
to elimination of both row and column (blocks) effects.
These experimental designs can be useful in engineering
and other fields.
I am having difficulty obtaining his adjusted treatment means
in his
2014 Oct 18
3
[LLVMdev] Performance regression on ARM
Hi Chandler,
That's embarrassing how weird this part of clang is. I have a provisional
patch which fixes the problem but underlines clang's problems. I will
submit it tonight for comments.
суббота, 18 октября 2014 г. пользователь Chandler Carruth написал:
>
> On Fri, Oct 17, 2014 at 7:51 AM, Anton Korobeynikov <
> anton at korobeynikov.info
>
2014 Oct 16
4
[LLVMdev] Performance regression on ARM
Folks,
First win of the benchmark buildbot!
http://llvm.org/perf/db_default/v4/nts/graph?plot.0=49.128.2&highlight_run=31861
It seems mandel-2 had a huge regression a few commits ago, and based
on a quick look, it may have to do with the inst combine changes. I
haven't investigated yet, but this is the first time I spot
regressions on test-suite, so I'd like to first congratulate