A Meta-Analysis Package for R https://mail.metafor-project.org/ 2026-04-17T11:24:36+00:00 https://mail.metafor-project.org/ https://mail.metafor-project.org/lib/exe/fetch.php/wiki:logo.png text/html 2022-08-22T17:33:35+00:00 Anonymous (anonymous@undisclosed.example.com) https://mail.metafor-project.org/doku.php/analyses?rev=1661189615 Analysis Examples The metafor package implements various meta-analytic models, methods, and techniques that have been described in the literature. The links below demonstrate how the models, methods, and techniques described in the respective references can be applied via the metafor package. The items are organized by topic (therefore, articles covering multiple topics may be listed multiple times). Alternatively, you can jump to the text/html 2022-08-03T11:14:11+00:00 Anonymous (anonymous@undisclosed.example.com) https://mail.metafor-project.org/doku.php/contributors?rev=1659525251 Contributors The following is a (probably incomplete) list of people (in no particular order) that have contributed code, discovered bugs, made suggestions for improvements, provided funding, or have made other notable contributions to the development of the metafor package:$k!$ text/html 2020-11-14T13:27:26+00:00 Anonymous (anonymous@undisclosed.example.com) https://mail.metafor-project.org/doku.php/diagram?rev=1605360446 An Overview of Functions in the metafor Package The diagram below shows the various functions in the metafor package (and how they are related to each other). If the package is installed, you should also be able to open this diagram directly from R with the command text/html 2025-12-18T15:07:52+00:00 Anonymous (anonymous@undisclosed.example.com) https://mail.metafor-project.org/doku.php/faq?rev=1766070472 Frequently Asked Questions General Questions The name 'metafor' stands for 'META-analysis FOr R' (so the package name is not 'metaphor', even if your spellchecker insists on that spelling ...). Based on some code I wrote as part of my dissertation research, I developed a function called $\mbox{H}_0{:}\; \theta = 0$$\alpha = .05$$I^2$$$I^2 = 100\% \times \frac{\hat{\tau}^2}{\hat{\tau}^2 + \tilde{v}},$$$\hat{\tau}^2$$\tau^2$$$\tilde{v} = \frac{(k-1) \sum w_i}{(\sum w_i)^2 - \sum w_i^2},$$$w_i… text/html 2024-09-02T06:44:13+00:00 Anonymous (anonymous@undisclosed.example.com) https://mail.metafor-project.org/doku.php/features?rev=1725259453 Package Features Below is an overview of the various features provided by the metafor package. Where applicable, function names are also indicated. Calculation of Effect Sizes and Outcome Measures The package allows the user to calculate various effect sizes and outcome measures frequently used in meta-analyses ( text/html 2026-03-13T08:16:46+00:00 Anonymous (anonymous@undisclosed.example.com) https://mail.metafor-project.org/doku.php/help?rev=1773389806 Documentation and Help Below you can find some suggestions and tips on getting started with the metafor package and how to obtain help if you get stuck or have questions about the package. Introduction Paper A good starting place for those interested in using the metafor package is the following paper: text/html 2024-09-19T06:41:50+00:00 Anonymous (anonymous@undisclosed.example.com) https://mail.metafor-project.org/doku.php/installation?rev=1726728110 Download and Installation Installing the Official Release The current official (i.e., CRAN) release can be installed within R with: install.packages("metafor") The same command can also be used to upgrade to the newest version if the package is already installed. text/html 2023-09-18T20:16:02+00:00 Anonymous (anonymous@undisclosed.example.com) https://mail.metafor-project.org/doku.php/links?rev=1695068162 Links Below are some links to other websites that are in some way relevant/related to the metafor package or other software packages for meta-analysis. Directly Related to the Package * Wolfgang Viechtbauer: Homepage of the package author. * Package Page @ CRAN: Page for the metafor package on CRAN. text/html 2021-11-06T12:18:32+00:00 Anonymous (anonymous@undisclosed.example.com) https://mail.metafor-project.org/doku.php/metafor?rev=1636201112 The metafor Package: A Meta-Analysis Package for R The metafor package is a free and open-source add-on for conducting meta-analyses with the statistical software environment R. The package consists of a collection of functions that allow the user to calculate various effect size or outcome measures, fit equal-, fixed-, random-, and mixed-effects models to such data, carry out moderator and meta-regression analyses, and create various types of meta-analytical plots. text/html 2022-09-06T08:25:35+00:00 Anonymous (anonymous@undisclosed.example.com) https://mail.metafor-project.org/doku.php/plots?rev=1662452735 Plots and Figures The metafor package provides several functions for creating a variety of different meta-analytic plots and figures, including forest, funnel, bubble, Baujat, L'Abbé, radial (Galbraith), GOSH, and normal quantile-quantile plots. Please follow the links below for some examples. text/html 2023-04-06T07:53:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://mail.metafor-project.org/doku.php/sidebar?rev=1680767636 Navigation * Homepage * Package News * Package Features * Package Update Log * To-Do List / Planned Features * Download and Installation * Documentation and Help * Function Diagram * Analysis Examples * Plots and Figures * Tips and Notes * Contributors * FAQs * Links External Links * Wolfgang Viechtbauer * The R Project * CRAN text/html 2022-10-15T13:21:17+00:00 Anonymous (anonymous@undisclosed.example.com) https://mail.metafor-project.org/doku.php/tips?rev=1665840077 Tips and Notes The links below point to pages illustrating various tips and notes that may be useful when working with the metafor package. In addition, some features of the package that may not be readily apparent from the documentation are explained in more detail.$\tau^2$$R^2$$I^2$ text/html 2022-08-30T07:01:20+00:00 Anonymous (anonymous@undisclosed.example.com) https://mail.metafor-project.org/doku.php/todo?rev=1661842880 To-Do List / Planned Features Below is a to-do list and a description of planned features that I would like to implement in the metafor package at some point in the future. This list is dynamic, incomplete, somewhat disorganized, and I cannot provide any kind of timeline when I will get around to implementing some of those things. If you are interested in working on any of these topics $\mu$$\tau^2$ text/html 2025-01-28T16:35:30+00:00 Anonymous (anonymous@undisclosed.example.com) https://mail.metafor-project.org/doku.php/updates_old?rev=1738082130 Older Package Updates Older updates of the metafor package are archived on this page. More recent updates can be found here. Version 3.0-2 (2021-06-02) * the metafor package now makes use of the mathjaxr package to nicely render equations shown in the HTML help pages text/html 2025-01-28T16:35:11+00:00 Anonymous (anonymous@undisclosed.example.com) https://mail.metafor-project.org/doku.php/updates?rev=1738082111 Package Updates On this page, you can find a description of the (recent) updates to the metafor package. Older updates are archived here. Version 4.8-0 (2025-01-28) * some general changes to the various forest() functions: argument header is now TRUE$R^2$