Displaying 19 results from an estimated 19 matches for "zaslavsky".
2007 Oct 19
6
r achives
sorry but how do i accsess r archives
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2012 Jul 04
1
How do you impute missing data using Latent Class Model (poLCA package)
...ose not to use Multiple Imputation(MI) is because
according to
[http://blogs.iq.harvard.edu/sss/archives/2008/09/a_handy_trick_f.shtml]
"MI packages assume the Multivariate Normal Distribution which may not hold
for certain types of categorical and binary data. Yucel Recai, Yulei He,
and Alan Zaslavsky point out in their May 2008 article in The American
Statistician, naive rounding MI imputations can bias estimates,
particularly when the underlying data are asymmetric or multimodal."
However instead of using Yucel Recai, Yulei He, and Alan Zaslavsky's
rounding strategy [
http://amstat....
2002 May 09
2
truncated normal
Does anyone know of an R-function that will generate an observation from a
truncated normal (left or right) with a mu and sigma2? Any correspondence
would be greatly appreciated.
Best regards, Scott Summerill
FAA ACB-330
SIGNAL Corp.
609-485-6377
scott.ctr.summerill at tc.faa.gov
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r-help mailing list -- Read
2003 Jan 27
1
rmultinom() -- how \\ via own C code?
...n Maechler <maechler@stat.math.ethz.ch> http://stat.ethz.ch/~maechler/
Seminar fuer Statistik, ETH-Zentrum LEO C16 Leonhardstr. 27
ETH (Federal Inst. Technology) 8092 Zurich SWITZERLAND
phone: x-41-1-632-3408 fax: ...-1228 <><
## This is based on rmultz2() from S-news by Alan Zaslavsky & Scott Chasalow;
## in R available from library(combinat) -- but it has
## Arg.names like rbinom(); returns n x p matrix
rmultinom <- function(n, size, prob) {
K <- length(prob) # #{classes}
matrix(tabulate(sample(K, n * size, repl = TRUE, prob) + K * 0:(n - 1),...
2009 Jan 07
12
R in the NY Times
This article is accompanied by nice pictures of Robert and Ross.
Data Analysts Captivated by Power of R
http://www.nytimes.com/2009/01/07/technology/business-computing/07program.html
January 7, 2009
Data Analysts Captivated by R?s Power
By ASHLEE VANCE
To some people R is just the 18th letter of the alphabet. To others, it?s the rating on racy movies, a measure of an attic?s insulation or
2002 Aug 05
0
Re: [S] Multinomial
...lity vector p.
Jacob> How can I do this?
I've recently written the following {for the R package "normix"}.
The above is really a FAQ.
I think I'd propose to adopt this (or an improvement of it) both
for R and S-plus :
## This is based on rmultz2() from S-news by Alan Zaslavsky & Scott Chasalow
## {and adapted from the R package "combinat"}.
## Arg.names like rbinom(); returns n x p matrix
rmultinom <- function(n, size, prob) {
K <- length(prob) # #{classes}
matrix(tabulate(sample(K, n * size, repl = TRUE, prob) + K * 0:(n - 1),...
2008 Nov 24
2
Estimating the standard error when you have sampling weights.
Hi,
Where can I find information ( freely available on the Internet , and also
books or other sources ) on how having sampling weights changes the
calculation of the standard error (of means and proportions)?
How good is R for this type of procedure? And SAS?
thanks
Robert
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2009 Feb 25
0
basketball (was: R spam)
...statistics which now
has its own ASA section, journal, etc. so I hope we won't get stuck on it
here, unless somebody writes a package! and also my excuses to the R
users at the big state university basketball powerhouses in the U.S. who
probably know much more about this than I do.
Alan Zaslavsky
2010 Jun 14
0
Registration deadline, useR! 2010
...luding
Dirk Eddelbuettel, John Fox, Virgilio Gomez-Rubio,
Richard Heiberger, Torsten Hothorn, Aaron King, Jan de Leeuw,
Nicholas Lewin-Koh, Andy Liaw, Uwe Ligges, Martin Maechler,
Katharine Mullen, Heather Turner, Ravi Varadhan, H. D. Vinod,
John Verzani, Alan Zaslavsky, Achim Zeileis.
The program will cover topics such as
* Applied Statistics & Biostatistics
* Bayesian Statistics
* Bioinformatics
* Chemometrics and Computational Physics
* Data Mining
* Econometrics & Finance
* Environmetrics & Ecological Modeling...
2009 Jul 27
0
useR! 2010
...uding
Dirk Eddelbuettel, John Fox, Virgilio Gomez-Rubio,
Richard Heiberger, Torsten Hothorn, Aaron King, Jan de Leeuw,
Nicholas Lewin-Koh, Andy Liaw, Uwe Ligges, Martin Maechler,
Katharine Mullen, Heather Turner, Ravi Varadhan, H. D. Vinod,
John Verzani, Alan Zaslavsky, Achim Zeileis.
The program will cover topics such as
* Applied Statistics & Biostatistics
* Bayesian Statistics
* Bioinformatics
* Chemometrics and Computational Physics
* Data Mining
* Econometrics & Finance
* Environmetrics & Ecological Modeling...
2009 Jul 27
0
useR! 2010
...uding
Dirk Eddelbuettel, John Fox, Virgilio Gomez-Rubio,
Richard Heiberger, Torsten Hothorn, Aaron King, Jan de Leeuw,
Nicholas Lewin-Koh, Andy Liaw, Uwe Ligges, Martin Maechler,
Katharine Mullen, Heather Turner, Ravi Varadhan, H. D. Vinod,
John Verzani, Alan Zaslavsky, Achim Zeileis.
The program will cover topics such as
* Applied Statistics & Biostatistics
* Bayesian Statistics
* Bioinformatics
* Chemometrics and Computational Physics
* Data Mining
* Econometrics & Finance
* Environmetrics & Ecological Modeling...
2010 Feb 22
0
useR! 2010, Submission/early registration deadline: March 1
...luding
Dirk Eddelbuettel, John Fox, Virgilio Gomez-Rubio,
Richard Heiberger, Torsten Hothorn, Aaron King, Jan de Leeuw,
Nicholas Lewin-Koh, Andy Liaw, Uwe Ligges, Martin Maechler,
Katharine Mullen, Heather Turner, Ravi Varadhan, H. D. Vinod,
John Verzani, Alan Zaslavsky, Achim Zeileis.
The program will cover topics such as
* Applied Statistics & Biostatistics
* Bayesian Statistics
* Bioinformatics
* Chemometrics and Computational Physics
* Data Mining
* Econometrics & Finance
* Environmetrics & Ecological Modeling...
2009 Jan 07
0
R in the NY Times-IAsians perspective
...or everyday
>> analysis, not just a research statistician's tool.
>>
>> Frank
>>
>>
>>> ####################
>>>
>>> Bill Pikounis
>>> Statistician
>>>
>>>
>>>
>>> On Wed, Jan 7, 2009 at 08:10, Zaslavsky, Alan M.
>>> <zaslavsk@hcp.med.harvard.edu> wrote:
>>>
>>>> This article is accompanied by nice pictures of Robert and Ross.
>>>>
>>>> Data Analysts Captivated by Power of R
>>>>
>>>>
>>>> http://www.nyt...
2007 Jul 07
2
random sampling with some limitive conditions?
I want to gain thousands of random sampling data by randomizing the
presence-absence data. Meantime, one important limition is that the row and
column sums must be fixed. For example, the data "tst" is following:
site1 site2 site3 site4 site5 site6 site7 site8 1 0 0 0 1 1 0 0 0 1 1 1 0
1 0 1 1 0 0 0 1 0 1 0 0 0 0 1 0 1 0 1 1 0 1 0 0 0 0 0 0 1 0 1 1 1 1 1 1 0 0
0 0 0 0 0 0 0 0 1 0 1 0
2009 Mar 11
5
Is there any difference between <- and =
Dear R-helpers:
I have a question related to <- and =.
I saw very experienced R programmers use = rather than <- quite
consistently.
However, I heard from others that do not use = but always stick to <- when
assigning valuese.
I personally like = because I was using Matabl, But, would like to receive
expert opinion to avoid potential trouble.
Many thanks in advance.
-Sean
2009 Mar 14
1
multiple hypothesis testing
...ral /
> transitional data (Ross Culloch)
> 32. Re: R multiline expression grief (Wacek Kusnierczyk)
> 33. Re: R multiline expression grief ( (Ted Harding))
> 34. Re: R multiline expression grief (Gabor Grothendieck)
> 35. Re: Is there any difference between <- and = (Alan Zaslavsky)
> 36. Re: R multiline expression grief (Wacek Kusnierczyk)
> 37. Re: Time-Ordered Clustering (Prew, Paul)
> 38. Re: Is there any difference between <- and = (Wacek Kusnierczyk)
> 39. updating packages? (rkevinburton@charter.net)
> 40. updating packages? (rkevinburton@charter...
2009 Jan 15
2
Interface to open source Reporting tools
...ot;Re: Contents of R-help digest..."
>
>
> Today's Topics:
>
> 1. Re: Help needed for Loading "tm" package (Prof Brian Ripley)
> 2. Re: rpart with interval censored data crashes R (David Winsemius)
> 3. AT&T Researchers and the New York Times (Alan Zaslavsky)
> 4. Re: The R Inferno (Tom Backer Johnsen)
> 5. Re: The R Inferno (Jason Morgan)
> 6. Re: Ashlee Vance's article on R in the New York Times
> (Stavros Macrakis)
> 7. Print specific matrix value??? (Nidhi Kohli)
> 8. Fitting pareto to some data (Borja Soto Vare...
2007 Apr 05
17
Reasons to Use R
Dear All,
The institute I work for is organizing an internal workshop for High
Performance Computing (HPC).
I am planning to attend it and talk a bit about fluid dynamics, but
there is also quite a lot of interest devoted to data post-processing
and management of huge data sets.
A lot of people are interested in image processing/pattern recognition
and statistic applied to geography/ecology, but I
2009 Apr 01
0
回复： R-help Digest, Vol 73, Issue 32
...nkhee dutta)
8. Re: how to input multiple .txt files (Mike Lawrence)
9. Wrong path to user defined library for the R Help Files
(Breitbach, Nils)
10. (no subject) (ankhee dutta)
11. Re: how to input multiple .txt files (Mike Lawrence)
12. Burt table from word frequency list (Alan Zaslavsky)
13. Re: Constrined dependent optimization. (rkevinburton@charter.net)
14. Re: Column name assignment problem (Steve Murray)
15. Re: which rows are duplicates? (Wacek Kusnierczyk)
16. Re: Constrined dependent optimization. (Paul Smith)
17. Re: how to input multiple .txt files (baptiste au...