Displaying 20 results from an estimated 100 matches similar to: "Quantile regression with complex survey data"
2002 Feb 04
2
maximal dataset size
Hi, there,
I am using PC window version R and dealing with big dataset usually. May
anyone let me whether the maximal dataset size in R is limited by computer
memory or hard drive capacity?
Thanks in advance.
Yiling Cheng, M.D., Ph.D.
Project Manager
The Cooper Institute for Aerobics Research
12330 Preston Road, Dallas, Texas 75230
phone: (972) 3413248; Fax: (972) 3413224
2002 Jan 30
2
question from a beginner
Dear there,
R is pretty flexible and powerful. I wonder whether there are any GUI
programs to
do basic statistic work by just clicking menu and selecting procedure.
Thank you for your time.
Yiling
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r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info",
2008 May 12
1
RPM-style install (SLED 10.1)
I am trying to install R on a SLED 10.1 machine.
R-base-2.7.0-7.1-i586.rpm fails with
stas at linux-6b8s:~/RPMs> rpm -Uvh R-base-2.7.0-7.1.i586.rpm
warning: R-base-2.7.0-7.1.i586.rpm: Header V3 DSA signature: NOKEY,
key ID 14ec5930
error: Failed dependencies:
libgfortran.so.1 is needed by R-base-2.7.0-7.1.i586
I tried to trick it into believing there's the library by setting up
2009 Jan 09
1
survey statistics, rate/proportions with standard errors
what does R have to compare with , say , proc surveymeans, estimate survey
means/proportions with standard errors, using Taylor methods?
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2009 Apr 14
1
import from stata
Dear R users,
I am trying to import a table from STATA, a dta file.
With a table called "table", this is what I do :
library("foreign")
read.dta(table)
It does not work. What am I doing wrong ?
Best Regards,
Dwayne
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2009 Aug 31
1
Test for stochastic dominance, non-inferiority test for distributions
Dear R-Users,
Is anyone aware of a significance test which allows
demonstrating that one distribution dominates another?
Let F(t) and G(t) be two distribution functions, the
alternative hypothesis would be something like:
F(t) >= G(t), for all t
null hypothesis: F(t) < G(t), for some t.
Best wishes,
Matthias
PS. This one would be ok, as well:
F(t) > G(t), for all t
null
2008 Nov 04
2
ordered logistic regression of survey data with missing variables
Hello:
I am working with a stratified survey dataset with sampling weights
and I want to use multiple imputation to help with missingness.
1. Is there a way to run an ordered logistic regression using both a
multiply imputed dataset (i.e. from mice) and adjust for the survey
characteristics using the weight variable? The Zelig package is able
to do binary logistic regressions for survey
2008 Jul 27
2
Link functions in SEM
Is it possible to fit a structural equation model with link functions in R? I
am trying to build a logistic-regression-like model in sem, because
incorporating the dichotomous variables linearly seems inappropriate. Mplus
can do something similar by specifying a 'link' parameter, but I would like
to be able to do it in R, ofcourse.
I have explored the 'sem' package from John Fox,
2008 Aug 18
1
Survey Design / Rake questions
I'm trying to learn how to calibrate/postStratify/rake survey data in
preparation for a large survey effort we're about to embark upon. As a
working example, I have results from a small survey of ~650 respondents,
~90 response fields each. I'm trying to learn how to (properly?) apply
the aforementioned functions.
My data are from a bus on board survey. The expansion in the
2007 May 31
1
Conditional logistic regression for "events/trials" format
Dear R users,
I have a large individual-level dataset (~700,000 records) which I am
performing a conditional logistic regression on. Key variables include
the dichotomous outcome, dichotomous exposure, and the stratum to which
each person belongs.
Using this individual-level dataset I can successfully use clogit to
create the model I want. However reading this large .csv file into R and
running
2009 Apr 09
3
Multiple Hexbinplots in 2 columns with a Single Categorical Variable
Dear Ladies and Gentlemen,
I have a fairly large database (N=13,000) and a single main categorical
discriminator between the groups.
I want to look at the time course of a number of continuous biochemical
variables over chronologic age.
Therefore I believe I need to prepare hexbinplots in two columns with simple
regression lines in them (with useOuterStrips (in library(latticeExtra) if
2009 Jan 12
3
polychoric correlation: issue with coefficient sign
Hello,
I am running polychoric correlations on a dataset composed of 12 ordinal and
binary variables (N =384), using the polycor package.
One of the association (between 2 dichotomous variables) is very high using
the 2-step estimate (0.933 when polychoric run only between the two
variables; but 0.801 when polychoric run on the 12 variables). The same
correlation run with ML estimate returns a
2008 Jan 16
1
Probability weights with density estimation
I am a physician examining an NHANES dataset available at the NCHS
website:
http://www.cdc.gov/nchs/about/major/nhanes/nhanes2005-2006/demo_d.xpt
http://www.cdc.gov/nchs/about/major/nhanes/nhanes2005-2006/hdl_d.xpt
http://www.cdc.gov/nchs/about/major/nhanes/nhanes2005-2006/tchol_d.xpt
Thank you to the R authors and the foreign package authors in
particular. Importing from the SAS export
2005 Apr 30
3
How to extract function arguments literally
Dear all,
One of my friends asked me if it is possible to extract actual R
function arguments literally (precisely, as strings). The reason is
simple. He feels sometimes awkward to attach quotation marks :-). What
he actually wants is to pass R command arguments to XLisp subroutines
(He has been an enthusiastic XLisp user for a long time and still tends
to use R as a wrapper to XLisp). Is it
2010 Sep 17
3
Combining Data Sets w/ Weights
Hello All,
I am still a beginner with R, and I only have a week or two under my belt so
far.
I'm working with NHANES anthropometric data on stature. I have two sets of
data that have different statistical weights. I'm trying to combine those
two data sets into one "mega-set" while retaining each data point's
individual weight.
If you have any idea as to how this is
2009 Jan 19
3
bootstrapped eigenvector method following prcomp
G'Day R users!
Following an ordination using prcomp, I'd like to test which variables
singnificantly contribute to a principal component. There is a method
suggested by Peres-Neto and al. 2003. Ecology 84:2347-2363 called
"bootstrapped eigenvector". It was asked for that in this forum in
January 2005 by J?r?me Lema?tre:
"1) Resample 1000 times with replacement entire
2007 Nov 08
2
centile reference chart / clildren growth chart - what package/method to use
We are constructing growth charts (age/weight and age/length) for children
with diagnosis that impacts weight/length.
But we we don't know how to use R for producing growth charts.
We are collection data of Age, Weight and Length.
The data are used to produce diagnosis-specific Growth charts (like the CDC
Growth Charts:
2008 Aug 15
2
Design-consistent variance estimate
Dear List:
I am working to understand some differences between the results of the
svymean() function in the survey package and from code I have written
myself. The results from svymean() also agree with results I get from
SAS proc surveymeans, so, this suggests I am misunderstanding something.
I am never comfortable with "I did what the software" does mentality, so
I am working to
2002 Feb 01
4
ROC curves using R
I did some serach around. It seems that ROC curve computation is not
supported on R. Anyone has some leads? Thanks.
Jason
=====
Jason G. Liao, Ph.D.
Division of Biometrics
UMDNJ School of Public Health
335 George Street, Suite 2200
New Brunswick, NJ 08903-2688
phone (732) 235-9748, fax (732) 235-9777
http://www.geocities.com/jg_liao
__________________________________________________
Great
2008 Apr 26
6
quasi-random sequences
Dear list useRs,
I have to generate a random set of coordinates (x,y) in [-1 ; 1]^2
for say, N points. At each of these points is drawn a circle (later
on, an ellipse) of random size, as in:
> N <- 100
>
> positions <- matrix(rnorm(2 * N, mean = 0 , sd= 0.5), nrow=N)
> sizes<-rnorm(N, mean = 0 , sd= 1)
> plot(positions,type="p",cex=sizes)
My problem is to