Skip to content

Search Archives

Search tips
from:Name Search by author name, e.g. from:Duncan Murdoch "exact phrase" Match an exact phrase word1 word2 Match messages containing both words Date range Use the date pickers to filter results to a time period

Use the list dropdown to narrow results to a specific mailing list. Combine from: with other terms to filter by author and content.

1,298 results for “from:Dimitris Rizopoulos”

"dlogis()" for large negative numbers (PR#7340)
Dimitris Rizopoulos · Nov 4, 2004 · r-devel

Full_Name: Dimitris Rizopoulos Version: 2.0.0 OS: Windows XP Pro. Submission from: (NULL) (134.58.253.113) > dlogis(-1e15) [1] NaN Warning message: NaNs produced in: dlogis(x, location, scale, log)

GLMMs with Adaptive Gaussian Quadrature
Dimitris Rizopoulos · Jun 15, 2018 · r-sig-mixed-models

Dear R mixed-model users, I?d like to announce the release of my new package GLMMadaptive for fitting generalized linear mixed models using adaptive Gaussian quadrature. You may read more about it here: https://goo.gl/7pi8Sh Any comments...

merge character strings
Dimitris Rizopoulos · Dec 2, 2008 · r-help

check at paste(), e.g., vec <- c("a", "b", "c") paste(vec, collapse = "") I hope it helps. Best, Dimitris mentor_ wrote: > Hi, > > how can I do the following in R?: > > vec <- c("a", "b", "c") > ....magic..... > print(str) > "abc" > > Cheers...

Deltas or changes
Dimitris Rizopoulos · Mar 9, 2010 · r-help

try this: x <- runif(100) a <- x[-1] / x[-length(x)] a I hope it helps. Best, Dimitris On 3/9/2010 2:37 PM, ManInMoon wrote: > > How can I generate a vector of differences between each elemtn of an...

convert factor data to numeric
Dimitris Rizopoulos · Jan 13, 2010 · r-help

check the following: http://cran.r-project.org/doc/FAQ/R-FAQ.html#How-do-I-convert-factors-to-numeric_003f Best, Dimitris Ahmet Temiz wrote: > hello > > could you give me a hint to convert data in factor type to...

Factor to continuous
Dimitris Rizopoulos · Apr 13, 2009 · r-help

check R FAQ 7.10 Best, Dimitris joewest wrote: > Hi > > I am really struggling with changing my factors into continuous variables. > There is plenty of information on changing continuous to a factor which is > the opposite of what i need...

Numerical Inversion of Cumulative Distribution Function
Dimitris Rizopoulos · Mar 6, 2012 · r-help

Check function uniroot(). I hope it helps. Best, Dimitris On 3/6/2012 7:47 PM, Gildas Mazo wrote: > Dear R users, > > Given a user-defined cumulative distribution function F, I want to compute F^{-1}(x). How is that...

list substring
Dimitris Rizopoulos · Apr 1, 2009 · r-help

try this: x <- c("xxxxx1", "xxxxx2", "yyyyx3") substr(x, 1, 4) Best, Dimitris calpeda wrote: > hi > I ve a list of item x = ( "xxxxx1" > "xxxxx2" > "yyyyx3") > > I need to extract a new vector y = ( "xxxx", > "xxxx", > "yyyy" > ) > I mean, for...

Subscript
Dimitris Rizopoulos · Jan 7, 2009 · r-help

try something like this: plot(0:1, 0:1, type = "n") text(0.5, 0.5, expression(paste(plain(log)[2], " intensity"))) and check ?plotmath for more info. I hope it helps. Best, Dimitris Timthy Chang wrote: > A similar question...

Random data
Dimitris Rizopoulos · Nov 25, 2009 · r-help

one way is: x <- sort(rnorm(100)) y <- rnorm(100, mean = x, sd = 0.3) plot(x, y) abline(a = 0, b = 1) I hope it helps. Best, Dimitris mentor_ wrote: > Hi, > > how can I produce random data which lies...

unsubscription
Dimitris Rizopoulos · Feb 17, 2010 · r-help

Christine SINOQUET wrote: > I want to unsuscribe from the R list. then visit this website: https://stat.ethz.ch/mailman/listinfo/r-help Best, Dimitris > Thanks. > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo...

Problems with lists...
Dimitris Rizopoulos · Jul 16, 2009 · r-help

have a look at the help page for ?"["; try also this a[[2]] a[[2]][2] a[[3]][3] Best, Dimitris voidobscura wrote: >> a > [[1]] > [1] 1 2 3 > > [[2]] > [1] 4 5 6 > > [[3]] > [1] 7 8 9 > > I...

lower / upper case letters in a plot
Dimitris Rizopoulos · Sep 24, 2008 · r-help

check: ?tolower() Best, Dimitris J?rg Gro? wrote: > Hi, > > How can I generate lower case letters for my axis-titles? > > > > Thanks, > J?rg > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE...

Re sampling from an ECDF
Dimitris Rizopoulos · Dec 4, 2008 · r-help

say 'x' is your sample, then try sample(x, 2000, replace = TRUE) I hope it helps. Best, Dimitris Spiderschwein wrote: > Good day everyone, > > I have about 500 values to generate my ecdf. > Now I want to sample 2000 values i...

Extract/Calculate score vector from "mer" objects
Dimitris Rizopoulos · Dec 6, 2011 · r-sig-mixed-models

Dear All, I'm interested in calculating the score vector (first order derivative of the log-likelihood) evaluated at the final parameter values (i.e., at convergence), for a mixed effects logistic regression model, returned by glmer(). Has anybody ever...

rounding problem
Dimitris Rizopoulos · Mar 1, 2009 · r-help

it the on-line help file of ?round, you can also find the functions: ceiling() floor() trunc() I hope it helps. Best, Dimitris tedzzx wrote: > Hi all, > > According to the help page on round(), round(1.5) could be either...

group by quantiles
Dimitris Rizopoulos · Nov 18, 2008 · r-help

check at cut() and split(), e.g., x <- rnorm(100) qx <- quantile(x) ind <- cut(x, qx, include.lowest = TRUE) split(x, ind) I hope it helps. Best, Dimitris Daniel Brewer wrote: > Hello, > > I was just wondering whether there is...

Subsetting matrix with values from vector
Dimitris Rizopoulos · Sep 15, 2009 · r-help

have a look at ?"%in%" Best, Dimitris jorgusch wrote: > Hello, > > I have a large matrix (data), in which there is a column offerid. The values > are numbers (lets say 1:5) > There is another vector (idnew), which contains some of...

[beginner] how to run *.r script from graphic interface (R Console window) ?
Dimitris Rizopoulos · Nov 21, 2010 · r-help

Have a look at function source(), i.e., type in the R console ?source I hope it helps. Best, Dimitris On 11/21/2010 1:23 PM, madr wrote: > > Is there a fuction like open("path/to/file"), readfile or...

dlogis for large negative numbers
Dimitris Rizopoulos · Oct 6, 2004 · r-help

Hi to all, > dlogis(-2000) [1] NaN Warning message: NaNs produced in: dlogis(x, location, scale, log) > dnorm(-2000) [1] 0 Is this an expected behaviour of `dlogis()'? Thanks in advance for any comments, Dimitris platform i386-pc-mingw32 arch...

Can't find what you're looking for? Try searching with Google .