Displaying 20 results from an estimated 10000 matches similar to: "Quantile Regressions/Multi-stage complex survey design"
2008 Aug 20
2
Quantile regression with complex survey data
Dear there,
I am working on the NHANES survey data, and want to apply quantile
regression on these complex survey data. Does anyone know how to do
this?
Thank you in advance,
Yiling Cheng
Yiling J. Cheng MD, PhD
Epidemiologist
CoCHP, Division of Diabetes Translation
Centers for Disease Control and Prevention
4770 Buford Highway, N.E. Mailstop K-10
Atlanta, GA 30341
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2012 Aug 10
1
Direct Method Age-Adjustment to Complex Survey Data
Hi everyone, my apologies in advance if I'm overlooking something simple in
this question. I am trying to use R's survey package to make a direct
method age-adjustment to some complex survey data. I have played with
postStratify, calibrate, rake, and simply multiplying the base weights by
the correct proportions - nothing seems to hit the published numbers on the
nose.
I am trying to
2011 Aug 23
0
Survey data: Quantile Regressions
I searched archives for how to do quantile regressions with complex survey
data, and there was nothing that could be helpful to a first time user. I am
looking for equivalent of the functions in "quantreg" package. A vignette
and/or examples will be very helpful. Is there someone on this list who has
used quantile regressions with survey data? Can you please provide examples
of code with
2011 Jan 26
1
Quantile regression (rq) and complex samples
I am new to R and am interested in using the program to fit quantile
regression models to data collected from a multi-stage probability
sample of the US population. The quantile regression package, rq, can
accommodate person weights. However, it is not clear to me that
boot.rq is appropriate for use with multi-stage samples (i.e., is
capable of sampling primary sampling units instead of survey
2010 Jun 03
1
problem with 'svyby' function from SURVEY package
Hello,
I'm using a complex survey dataset and my goal is to simply spit out a bunch of probability-weighted outcome variable means for the different levels of covariate. So I first define the structure of the study design (I'm using the CDC's NHANES data):
dhanes <- svydesign(id=~PSU, strat=~STRATA, weight=~lab_weight, data=final, nest=TRUE)
No problem there.
Now I use the
2011 Jul 12
1
Question re complex survey design and cure models
Hello all,
I am using AddHealth data to fit a cure, aka split population model using nltm. I am not sure how to account for the complex survey design - does anyone have any suggestions? Any help would be greatly appreciated!
Sincerely,
Sam
2012 Sep 25
1
Three Stage Sampling of categorical variable using 'survey' in R
For a sanitation project in Bangladesh I need to design a three stage sample
survey to be representative of around 40 million people. I find myself
suddenly with several challenges with which I struggle and would be
gratefully for any help. As the questions are linked I kept them together
rather than creating multiple posts
1) SURVEY DESIGN
So far I designed mainly two stage cluster surveys but
2006 Jul 23
1
Warning Messages using rq -quantile regressions
I am a new to using quantile regressions in R. I have estimated a set of
coefficients using the method="br" algorithm with the rq command at various
quantiles along the entire distribution.
My data set contains approximately 2,500 observations and I have 7 predictor
variables. I receive the following warning message:
Solution may be nonunique in: rq.fit.br(x, y, tau = tau, ...)
2015 Sep 04
0
nhanesA - easy retrieval and import of NHANES data
Dear R enthusiasts, I would like to announce nhanesA, a package that
enables easy retrieval of the data tables that are available at the
National Health and Nutritional Examination Survey (NHANES).
NHANES data are used in over 10,000 peer-reviewed journal publications
every year. In addition to easy table download, nhanesA features several
functions that implement web scraping (using rvest) to
2015 Sep 04
0
nhanesA - easy retrieval and import of NHANES data
Dear R enthusiasts, I would like to announce nhanesA, a package that
enables easy retrieval of the data tables that are available at the
National Health and Nutritional Examination Survey (NHANES).
NHANES data are used in over 10,000 peer-reviewed journal publications
every year. In addition to easy table download, nhanesA features several
functions that implement web scraping (using rvest) to
2012 Oct 16
1
Package survey: Compute standard deviations from complex survey designs
Hello,
svyvar from the survey package computes variances (with standard errors)
from survey design objects. Is there any way to compute standard
deviations and their standard errors in a similar manner?
Thanks a lot,
Sebastian
2012 Jul 10
1
Why 95% "quantile" empty in R or why 95% "quantile" = 1 with data values between 0 and 1?
I am calling quantiles as follows. I don't understand why sometimes the
columns (data values) above 95% are returned as "NULL"!! When I drop the
percentile down to 92%, I see colums appearing. Why would any quantile be
empty? I see sometimes that 95% percentile is being chosen as "1" for my
data between 0 and 1, where obviously there's no column value equal to 1.
But
2004 Jul 23
2
Complex Surveys...Specifying Design
I need some guidance from someone who is familiar/has some experience with
the survey package.
The data that I am using is from the Medical Expenditure Panel Survey
(www.meps.ahrq.gov <http://www.meps.ahrq.gov/> ). The STRATA and PSU
variables are varstr01 and varpsu01 respectively. When I try to specify
them with the svydesign function I get an error message. An excerpt of my
session
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
2010 Oct 19
1
could not find function "hmatplot"
I need a picture like this:
http://rwiki.sciviews.org/doku.php?id=graph_gallery:graph38
http://rwiki.sciviews.org/doku.php?id=graph_gallery:graph38
but when I try compile it
require("hexbin")
data(NHANES)# pretty large data set!
good <- !(is.na(NHANES$Albumin) | is.na(NHANES$Transferin))
NH.vars <- NHANES[good,
2004 Feb 04
1
Fitting nonlinear (quantile) models to linear data.
Hello.
I am trying to fit an asymptotic relationship (nonlinear) to some
ecological data, and am having problems. I am interested in the upper
bound on the data (i.e. if there is an upper limit to 'y' across a range
of 'x'). As such, I am using the nonlinear quantile regression package
(nlrq) to fit a michaelis mention type model.
The errors I get (which are dependant on
2008 Sep 27
1
quantile / centile
I'm wondering if there is a simple way to assign a quantile to a vector in a
data frame, much like one could in Stata using centile. Let's say I want 100
slices in my assignation. I can easily see what the limits of each slice by
using quantile:
quantile(my.df$my.var, probs=seq(0, 1, 0.01))
But how do I assign the appropriate value to each row/record in my data
frame? Clearly the
2007 Nov 11
1
Non-crossing Nonparametric quantile regressions
I've been looking for ways to calculate a large number (100) of non-crossing
Nonparametric quantile regressions on large populations (1000+).
Can the quantreg package in R ensure the non-crossing property?
If not, do you know any alternative?
Thank you,
Paulbegc
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2010 Mar 28
2
Design of a survey using the "survey" package
I have looked through the new "Complex Surveys" book and the documentation
for the "survey" package and it appears to me that there are no functions in
"survey" that help one to design a sampling scheme. For example, in the book
section 2.8 discusses the design of stratified samples, but there is no
mention of any functions in the "survey" package that
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