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1,350 results for “from:Wolfgang Viechtbauer”

[R-meta] Free Workshop on Meta-Analysis with R and metafor
Wolfgang Viechtbauer · Mar 23, 2023 · r-sig-meta-analysis

Hi all, A bit late (and I generally have avoided using this mailing list for such announcements), but in case nobody has anything better to do on a Friday evening (or morning/night, depending on your time zone), I will...

[R-meta] Confidence intervals for effect sizes in pretest posttest control group designs
Wolfgang Viechtbauer · May 13, 2019 · r-sig-meta-analysis

Hi C?lia, An approximate 95% CI can be obtained with: dat$yi + c(-1,1) * qnorm(.975) * sqrt(dat$vi) Best, Wolfgang -----Original Message----- From: R-sig-meta-analysis [mailto:r-sig-meta-analysis-bounces at r-project.org...

[R-meta] Effect size using forest plot
Wolfgang Viechtbauer · Dec 13, 2018 · r-sig-meta-analysis

Hi Julie, What kind of effect size measure you want to plot? You say you have means, SDs, and Ns. For a single group or two groups? In the latter case, you probably want standardized mean differences. Then take a...

[R-meta] text() x.y coordinates
Wolfgang Viechtbauer · Jul 5, 2021 · r-sig-meta-analysis

Dear Andrzej, I've added a plot to the documentation that hopefully clarifies how forest plots created with metafor are arranged: https://wviechtb.github.io/metafor/reference/forest.rma.html Best, Wolfgang >-----Original Message----- >From: R-sig-meta-analysis [mailto...

[R-meta] CRAN Task View updated
Wolfgang Viechtbauer · Sep 24, 2019 · r-sig-meta-analysis

Thanks, Michael, for keeping the task view up-to-date! An impressive list of packages that has accumulated over the years. Best, Wolfgang -----Original Message----- From: R-sig-meta-analysis [mailto:r-sig-meta-analysis-bounces at r-project.org...

[R-meta] PhD or Post-Doc Position
Wolfgang Viechtbauer · Dec 2, 2024 · r-sig-meta-analysis

Hi all, I have funding for either a regular PhD project (typically four years here in the Netherlands) or a two-year post-doc to work with me on a variety of different topics related to the statistical methods for...

[R-meta] extract pval from robust function
Wolfgang Viechtbauer · Mar 24, 2022 · r-sig-meta-analysis

Hi Roger, robust(res, cluster=dat$district)$pval[2] Use str() to find out about the structure of an object, so: str(robust(res, cluster=dat$district)) Scanning through all that stuff will often lead to the answer. Best, Wolfgang...

roxygen2 & markdown & math
Wolfgang Viechtbauer · Jan 12, 2021 · r-help

Dear Sigbert, The mathjaxr package provides this: https://cran.r-project.org/package=mathjaxr https://github.com/wviechtb/mathjaxr Best, Wolfgang >-----Original Message----- >From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Sigbert >Klinke >Sent...

[R-meta] Setting Axis in Forest Function
Wolfgang Viechtbauer · May 30, 2022 · r-sig-meta-analysis

Hi DJ, Maybe you are looking for the 'alim' (or 'at') argument. Best, Wolfgang >-----Original Message----- >From: R-sig-meta-analysis [mailto:r-sig-meta-analysis-bounces at r-project.org] On >Behalf Of D J >Sent: Monday, 30 May...

[R-meta] forest plot details
Wolfgang Viechtbauer · Oct 15, 2021 · r-sig-meta-analysis

Hi Norman, In the example you linked to, just replace the 'order=dat$alloc' part in forest() with 'order=order(dat$alloc, dat$yi)'. Best, Wolfgang >-----Original Message----- >From: R-sig-meta-analysis [mailto:r-sig-meta-analysis-bounces at...

S3 method dispatch for methods in local environments
Wolfgang Viechtbauer · May 12, 2020 · r-devel

Dear All, In R 3.6.3 (and earlier), method dispatch used to work for methods stored in local environments that are attached to the search path. For example: myfun <- function(y) { out <- list(y=y) class(out) <- "myclass" return...

[R-pkg-devel] speeding up package code/build/test cycle
Wolfgang Viechtbauer · Jun 24, 2021 · r-package-devel

Dear Greg, You might want to look into the load_all() function from 'devtools'. Best, Wolfgang >-----Original Message----- >From: R-package-devel [mailto:r-package-devel-bounces at r-project.org] On Behalf Of >Greg Minshall >Sent: Thursday, 24 June...

[R-meta] rma.mv for studies reporting composite of and/or individual subscales
Wolfgang Viechtbauer · Nov 24, 2021 · r-sig-meta-analysis

>-----Original Message----- >From: Timothy MacKenzie [mailto:fswfswt at gmail.com] >Sent: Wednesday, 24 November, 2021 19:18 >To: Viechtbauer, Wolfgang (SP) >Cc: R meta >Subject: Re: rma.mv for studies reporting composite of and/or individual >subscales > >>rma.mv(es...

Can browseURL open a lynx browser?
Wolfgang Viechtbauer · Mar 20, 2022 · r-help

Dear Ashim, If you really want to use lynx, then you need to open up a new terminal to make this work. For example, this will do: browseURL("http://www.r-project.org","xterm -e lynx") But this will open...

how to specify uncorrelated random effects in nlme::lme()
Wolfgang Viechtbauer · Jan 9, 2024 · r-help

Dear Zhen, You can use this with pdDiag(). An example: library(nlme) res <- lme(distance ~ age*Sex, random = list(Subject = pdDiag(~ age)), data=Orthodont) summary(res) Best, Wolfgang > -----Original Message----- > From: R-help <r-help-bounces at r-project.org...

[R-meta] Remove form list
Wolfgang Viechtbauer · Mar 14, 2022 · r-sig-meta-analysis

Dear John, Instructions for managing your subscription can be found at the end of each message. Best, Wolfgang >-----Original Message----- >From: R-sig-meta-analysis [mailto:r-sig-meta-analysis-bounces at r-project.org] On >Behalf Of John Tully...

[R-meta] Plotting the correlation among true/random effects across categories
Wolfgang Viechtbauer · Jun 26, 2023 · r-sig-meta-analysis

They can be useful for various things: 1) for diagnostic purposes (e.g., assessing normality assumptions), 2) they can provide an estimate of the treatment effect in particular studies (that not only takes the observed effect from the study into...

URL checks
Wolfgang Viechtbauer · Jan 11, 2021 · r-devel

>>>>>> Viechtbauer, Wolfgang (SP) >>>>>> on Fri, 8 Jan 2021 13:50:14 +0000 writes: > > > Instead of a separate file to store such a list, would it be an idea >to add versions of the \href{}{} and \url{} markup commands that are...

forest plot -metafor package
Wolfgang Viechtbauer · Mar 22, 2021 · r-help

Dear Usmle Ck, This is what the 'slab' argument is for (for adding 'study labels'). For an example, see: https://www.metafor-project.org/doku.php/plots:forest_plot Best, Wolfgang >-----Original Message----- >From: R-help [mailto:r-help-bounces...

[R-meta] MLMA - shared control group
Wolfgang Viechtbauer · Aug 30, 2021 · r-sig-meta-analysis

>-----Original Message----- >From: Reza Norouzian [mailto:rnorouzian at gmail.com] >Sent: Monday, 30 August, 2021 17:36 >To: Viechtbauer, Wolfgang (SP) >Cc: Jorge Teixeira; R meta >Subject: Re: [R-meta] MLMA - shared control group > >Dear Wolfgang, > >Jorge may benefit from...

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