similar to: questions about R

Displaying 20 results from an estimated 3000 matches similar to: "questions about R"

2004 Sep 04
5
R question
Hi, Would you help me solve the following question? Thanks. Question: If I try to set the probability=0.05 and find the approximate x. (The answer should be somewhere between 2.1782 and 2.1783.) I write about this R program as follows but I don¡¦t know how to get the value of x which is between 2.1782 and 2.1783. library(mvtnorm) value<-array(1000) a<-array(1000)
2000 Nov 14
1
mvtnorm
Announcement: mvtnorm Multivariate Normal and T Distribution mvtnorm implements two R functions for the computation of the multivariate t and normal distribution: pmvt: Computes the the distribution function of the multivariate t distribution for arbitary limits, degrees of freedom and correlation matrices based on algorithms by Genz and Bretz. pmvnorm: Computes the distribution
2000 Nov 14
1
mvtnorm
Announcement: mvtnorm Multivariate Normal and T Distribution mvtnorm implements two R functions for the computation of the multivariate t and normal distribution: pmvt: Computes the the distribution function of the multivariate t distribution for arbitary limits, degrees of freedom and correlation matrices based on algorithms by Genz and Bretz. pmvnorm: Computes the distribution
2010 Jan 14
1
adapt package missing because of licensing issue: fix?
I think this is probably known by someone, but I wanted to ask/comment: The 'adapt' package has been removed from CRAN because of an 'unclear' license. That makes sense, but it actually took a bit of digging for me to discover that, and if I had been a student I might not have figured it out. The package is simply missing from the CRAN compiled packages page; I did find
2006 Oct 01
2
Metadata & RDF
On 30/09/06, Ralph Giles <giles@xiph.org> wrote: > On Sat, Sep 30, 2006 at 12:21:53PM +0200, Danny Ayers wrote: > > > Basically I'd like to embed arbitrary (meta)data in flac files. > > I agree it would be best to define a new block type for RDF > metadata, or probably better for random attached XML data, That sounds reasonable, but... and > let the xml parser
2017 Oct 02
5
Issues with 'Miwa' algorithm in mvtnorm package
Currently doing some work on local maxima on a random field and have encountered an issue with the Miwa algorithm used with the pmvnorm function in the mvtnorm R package. Based on recommendations by Mi et al., we ran the mvtnorm package using the Miwa algorithm, since we have a maximum of 4 dimensions with non-singular matrices. However, running the estimation procedure in this way, we obtained
2006 Feb 01
3
Parsing RDF coming from a URL
Hello, i''m writing an application that needs geocoding information for locations outside of the US. I''m using the brainoff.com geocoding service mappoint = Net::HTTP.new(''brainoff.com'', 80) response = mappoint.get(''/geocoder/rest/?city=Gent,BE'') logger.debug response.body and the body of the response is in the following form : <rdf:RDF
2006 Sep 30
2
Metadata & RDF
I'm very pleased to come across flac, good work folks! I would like advice and/or have a spec feature request. Please bear in mind that I am totally new to the format, apologies if what I describe has been discussed before. Basically I'd like to embed arbitrary (meta)data in flac files. For example, it may be about the audio, but then again it may be about the creator of the audio, or
2007 May 09
2
pvmnorm, error message
Hello there! My operating system is Windows XP, my version of R is the latest (R-2.5.0). Recently I have downloaded the package "mvtnorm" and a problem with the command "pmvnorm" occured. Trying to enter the lines ... A <- diag(3) A[1,2] <-0.5 A[1,3] <- 0.25 A[2,3] <- 0.5 pvmnorm(lower=c(-Inf,-Inf,-Inf), upper=c(2,2,2),mean = c(0,0,0), corr=A) I got the following
2017 Oct 02
0
Issues with 'Miwa' algorithm in mvtnorm package
Good point. Now this returns 0.04062184. Hmmm..... On Mon, Oct 2, 2017 at 6:30 PM, Hollie Johnson (PGR) < h.a.johnson at newcastle.ac.uk> wrote: > Hi Eric, > > > Thanks for having a look into this. I think you have a small typo... > > B <- matrix(x, nrow=3, byrow = TRUE) should read B <- matrix(y, nrow=3, > byrow = TRUE) > > > Regards, Hollie >
2013 Apr 05
2
Text Encoding
Dear R-Help, I am using the RDF package/ R 2.14 with the RDF package to download data from a website, and then use R to manipulate it. Text on the website is UTF-8. The RDF package's rdf_load command is converting it into a different encoding, which converts non-ASCII characters to unicode codes. On the webpage/sparql RDF: "4.5µg of cDNA was used" In R, the RDF triple gives:
2016 Oct 18
2
A use of RDF to extend register Remat
Dear Community, I would like to discuss few points to use RDF to extend register remat scope. Mr. Krzysztof and I have started discussion this on private mail. But I think now it would be better to include community. Interested community member kindly previous discussion (at the end of mail) before starting here. After analyzing if RDF can be used for solving Remat, we think that problem with
2016 Mar 23
2
[GSoC 2016] Code Generation Improvements task
On 3/1/2016 11:26 AM, vivek pandya via llvm-dev wrote: > > Still I am looking for feedback on RDF part and also if some one is > willing to mentor me. Hi Vivek, Sorry, I missed this email. I wrote the RDF stuff and I'd be happy to help you out with it if you are interested. The idea was to have a utility class that would represent the data flow between registers. The registers
2009 Nov 20
2
Problem with Numerical derivatives (numDeriv) and mvtnorm
I'm trying to obtain numerical derivative of a probability computed with mvtnorm with respect to its parameters using grad() and jacobian() from NumDeriv. To simplify the matter, here is an example: PP1 <- function(p){ thetac <- p thetae <- 0.323340333 thetab <- -0.280970036 thetao <- 0.770768082 ssigma <- diag(4) ssigma[1,2] <- 0.229502120
2006 Sep 30
1
error from pmvnorm
Hi all, Can anyone tell me what the following error message means? " Error in mvt(lower = lower, upper = upper, df = 0, corr = corr, delta = mean, : NA/NaN/Inf in foreign function call (arg 6)" It was generated when I used the 'pmvnorm' function in the 'mvtnorm' package. Thanks a lot. Yonghai Li
2017 Oct 02
0
Issues with 'Miwa' algorithm in mvtnorm package
Rather specialized. As this appears to be primarily a statistical, not an R programming question, you may do better posting on a statistical site like http://stats.stackexchange.com/ if you don't get a satisfactory reply here . Alternativey, if you think this is a package bug, perhaps contact the package maintainer directly, as (s)he may not monitor this list. -- Bert Bert Gunter
2007 Jul 07
2
No convergence using ADAPT
I am trying calculate a probability using numerical integration. The first program I ran spit out an answer in a very short time. The program is below: ## START PROGRAM trial <- function(input) { pmvnorm(lower = c(0,0), upper = c(2, 2), mean = input, sigma = matrix(c(.1, 0, 0, .1), nrow = 2, ncol = 2, byrow = FALSE)) } require(mvtnorm) require(adapt) bottomB <- -5*sqrt(.1) topB <-
2012 Jul 27
3
bivariate normal
Dear list members I need a function that calculates the bivariate normal distribution for each observation. It is part of a likelihood function and I have 1000's of cases. As I understand it I cannot use packages like "mvtnorm" because it requres a covariance matrix of the same dimension as the number of observations. Basically what I need is a function that takes as arguments a
2000 Aug 02
4
RDF Metadata Specification
I've put together the first attempt to defining an RDF metadata vocabulary for use with the CD Index/MusicBrainz/OggVorbis. If you care about metadata issues, please take a look at: http://www.cdindex.org/MM I've included a section for video specific stuff, but everything that I originally had in there is being covered by the MM:Contributors section. The Contributors stuff will allow
2005 May 14
1
pmvnorm
Hi there, pmvnorm(lo=c(-Inf,-Inf), up=c(Inf,Inf), mean=c(0,0) ) should give me "1", right? But it doens't - it giver me "0". Would someone help me, please? [[alternative HTML version deleted]]