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2009 Feb 19
4
Matrix package: band matrix
...the Matrix will be 10^5 x 10^5 or so, with perhaps 10-20 non-zero elements above the diagonal per row, I can't do it by constructing a full matrix and then using the band() function to subset it to a band matrix. Any suggestions? -thomas Thomas Lumley Assoc. Professor, Biostatistics tlumley at u.washington.edu University of Washington, Seattle
2008 Sep 12
2
Fw: Complex sampling survey _ Use of survey package
-------------------------------------------------- From: "Ahoussou Sylvie" <sylvie.ahoussou at antilles.inra.fr> Sent: Friday, September 12, 2008 9:48 AM To: "Thomas Lumley" <tlumley at u.washington.edu> Subject: Re: [R] Complex sampling survey _ Use of survey package > Thanks for your answer > > I think I made a mistake when I recopied the 5 first rows of my database > > here is the table with the comlums of interest > > num esp fpc1 Totanim Id_An >...
2010 May 07
0
A fix that for 'bquote' that may work (PR#14031)
--- On Fri, 6/11/09, tlumley at u.washington.edu <tlumley at u.washington.edu> wrote: > From: tlumley at u.washington.edu <tlumley at u.washington.edu> > Subject: Re: [Rd] A fix that for 'bquote' that may work? (PR#14031) > To: suharto_anggono at yahoo.com > Cc: r-devel at stat.math.ethz.ch, R-...
2009 Oct 23
2
Memory Problems with CSV and Survey Objects
...7 > memory.size() [1] 1449.06 > gc() used (Mb) gc trigger (Mb) max used (Mb) Ncells 131148 3.6 593642 15.9 15680924 418.8 Vcells 45479988 347.0 173526492 1324.0 220358611 1681.3 A description of the survey package can be found here: http://faculty.washington.edu/tlumley/survey/ I tried creating a work-around by using the database-backed survey objects (DB SO), included in the survey package to conserve memory on larger datasets like this one. Unfortunately, I don't think the survey package supports database connections for replicate weight designs yet, since...
2010 Jan 05
0
apparently incorrect p-values from 2-sided Kolmogorov-Smirnov (PR#14178)
...cannot install new versions of software myself) ? (b) Is there a reference you can give me to a published paper where the method being used to compute the p-values is described? Many thanks, David. ------------------------------------------------------------------------------ On Fri, 18 Dec 2009, tlumley at u.washington.edu wrote: > > > I've fixed this by adding 0.5/mn to q. The problem (at least in principle) > with multiplying them all up is integer overflow. > > By the time 0.5/mn underflows to zero, missing one value in the distribution > won't matter. > >...
2006 Jan 06
7
Multiplication (PR#8466)
hi - in version 2.1 the command >-2^2 gives -4 as the answer. (-2)^2 is evaluated correctly. Cheers, George Casella -- George Casella Phone: (352) 392-1941 Ext. 204 Distinguished Professor and Chair Cell: (352) 682-7210 Department of Statistics Fax: (352) 392-5175 University of Florida Email: casella at stat.ufl.edu P.O. Box 118545 Gainesville, FL
2006 Jan 06
7
Multiplication (PR#8466)
hi - in version 2.1 the command >-2^2 gives -4 as the answer. (-2)^2 is evaluated correctly. Cheers, George Casella -- George Casella Phone: (352) 392-1941 Ext. 204 Distinguished Professor and Chair Cell: (352) 682-7210 Department of Statistics Fax: (352) 392-5175 University of Florida Email: casella at stat.ufl.edu P.O. Box 118545 Gainesville, FL
2009 Apr 09
2
better way of recoding factors in data frame?
Hi all, I apologize in advance for the length of this post, but I wanted to make sure I was clear. I am trying to merge two dataframes that share a number of rows (but some are unique to each data frame). Each row represents a subject in a study. The problem is that sex is coded differently in the two, including the way missing values are represented. Here is an example of the merged dataframe:
2006 Jul 18
2
FW: Large datasets in R
...that have to be memory resident and use more memory as the amount of data increases, this may not hold. Can someone shed light on this? 2. Is What 64-bit versions of R are available at present? Marsh Feldman The University of Rhode Island -----Original Message----- From: Thomas Lumley [mailto:tlumley at u.washington.edu] Sent: Monday, July 17, 2006 3:21 PM To: Deepankar Basu Cc: r-help at stat.math.ethz.ch Subject: Re: [R] Large datasets in R On Mon, 17 Jul 2006, Deepankar Basu wrote: > Hi! > > I am a student of economics and currently do most of my statistical work > using STATA...
2007 Mar 15
7
Hardware for a new Workstation for best performance using R
Hi, we are looking for a new workstation for big datasets/applications (easily up to 100'000 records and up to 300 Variables) using R. As an example: Variable Selection for a multivariate regression using stepAIC. What is the best configuration for a workstation to reach a high performance level for computing with R? Single core or multi core (is R together with nws package really able to
2003 Jan 25
1
survey package
...mportantly, though, I don't do this sort of analysis routinely, so it's possible that some part of the interface is completely insane from the viewpoint of practising survey statisticians. Now would be an excellent time to complain. -thomas Thomas Lumley Asst. Professor, Biostatistics tlumley at u.washington.edu University of Washington, Seattle
2001 Mar 09
2
Neural Net for R for Win
Hello. Is NN for R for Win available? It seemes that there's no NN package in contributed ones. -------------- next part -------------- An HTML attachment was scrubbed... URL: https://stat.ethz.ch/pipermail/r-help/attachments/20010310/6a58939c/attachment.html
2003 Jan 25
1
survey package
...mportantly, though, I don't do this sort of analysis routinely, so it's possible that some part of the interface is completely insane from the viewpoint of practising survey statisticians. Now would be an excellent time to complain. -thomas Thomas Lumley Asst. Professor, Biostatistics tlumley at u.washington.edu University of Washington, Seattle
2006 Jul 21
2
Order-restricted inference
Hello, I looked for R packages which focused on order-restricted statistical inference, but I could find only the isoreg() function. I would need to test whether the means in my (repeated measures) data follow a given order, e.g. A<B=C<D. I took a look at the monograph by Barlow et al. (1972) on this topic and found that for my case the null hypothesis is always A=B=C=D. This might be
2009 Mar 19
2
Package HDF5
The package works fine, but it seems not to provide access to fields, but only to the whole data in a certain file (function hdf5load(file, load = TRUE, verbosity = 0, tidy = FALSE)) Since hdf5 organizes the data and metadata in a hierarchical structure, we must explore in our problem (file>7GB), but it seems not possible with the functions in the package. Any suggestions? Please, let me know
2009 Sep 23
2
scaled Schoenfeld residuals
hi sorry if this has been discussed before, but I'm wondering why the scaled Schoenfeld residuals do not follow the defining formula for obtaining them from the ordinary Schoenfeld residuals, but are instead offset by the estimated parameter values. e.g. library(survival) attach(ovarian) sv<-Surv(futime,fustat) f1<-coxph(sv~age+ecog.ps) f1
2009 Dec 18
0
apparently incorrect p-values from 2-sided Kolmogorov-Smirnov (PR#14158)
...exectued one too few or one > too many times. And yes, I think those quantities should be multiplied up by > m*n to all become integers so we escape rounding error problems. David. > ------------------------------------------------------------------------------ > On Wed, 16 Dec 2009, tlumley at u.washington.edu wrote: > >> On Tue, 15 Dec 2009, allwrigh at maths.ox.ac.uk wrote; (in part) >> >>> >>> x<-1:5 >>> y<-c(2.5,4.5) >>> ks.test(x,y) >>> >>> The value of the D_2,5 statistic is calculated as 0.4 correctly...
2009 Dec 15
2
apparently incorrect p-values from 2-sided Kolmogorov-Smirnov test (PR#14145)
This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --1132542651-1468968864-1260896436=:8788 Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII I am using R version 2.6.2 (2008-02-08) on a Ubuntu Linux system. I seemed to be finding occasional errors in the p-values produced by ks.test(a,b)
2003 Nov 18
3
Copula calculation in R?
Hello Anyone that now of any function in R that can calculate copulas? Or if anyone have any code avaible I would be more than interested. Thank you in advance /Thomas ______________________________________________ R-help at stat.math.ethz.ch mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
2001 Aug 20
2
lm
By error I used the function lm with arrays. Is this a legal action? funtion call: h.lm<-lm(h.0~h.9+h.8) where all of the variables are arrays of dimension 722,6,10 Thank you for your help. Thomas Pesl -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info",