From: John Peterson [mailto:john.peterson@gmail.com]
> > Sent: Tuesday, December 08, 2015 14:25
> > To: Viechtbauer Wolfgang (STAT)
> > Cc: R-help@r-project.org
> > Subject: Re: [R] metafor package
> >
> > Hi Dr. Viechtbauer,
> >
> > The code
Psychiatry and
> Neuropsychology | Maastricht University | P.O. Box 616 (VIJV1) | 6200 MD
> Maastricht, The Netherlands | +31 (43) 388-4170 | http://www.wvbauer.com
>
> > -Original Message-
> > From: John Peterson [mailto:john.peterson@gmail.com]
> > Sent: Monda
m: John Peterson [mailto:john.peterson@gmail.com]
> Sent: Tuesday, December 08, 2015 14:25
> To: Viechtbauer Wolfgang (STAT)
> Cc: R-help@r-project.org
> Subject: Re: [R] metafor package
>
> Hi Dr. Viechtbauer,
>
> The code provided in the metafor projects website for subgroup i
r 07, 2015 22:14
> To: Viechtbauer Wolfgang (STAT)
> Subject: Re: [R] metafor package
>
> Hi Dr. Viechtbauer,
> Thank you very much for your reply. I tried your advice and was able to
> make a forest plot with only the estimates for each subgroup.For the
> estiamte for each subgroup,
m
> -Original Message-
> From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of John
> Peterson
> Sent: Monday, December 07, 2015 01:39
> To: r-help@r-project.org
> Subject: [R] metafor package
>
> Hi Everyone,
>
> I am conducting a meta-analysis
Hi Everyone,
I am conducting a meta-analysis using the metafor package. I am interested
in obtaining an estimate by subgroup only without showing an overall
effect. This is directly from the metafor website. How would i modify this
code to only show subgroup effects? Further, I want to show weight
om: r-help-boun...@r-project.org [r-help-boun...@r-project.org] On
Behalf Of Dietlinde Schmidt [schmidt.dietli...@web.de]
Sent: Thursday, July 03, 2014 3:07 PM
To: r-help@r-project.org
Subject: [R] metafor package: changing decimal in forest plot to
midlinedecimal
Dear R-Community,
I need to chan
___
From: r-help-boun...@r-project.org
[r-help-boun...@r-project.org] On Behalf Of
Dietlinde Schmidt [schmidt.dietli...@web.de]
Sent: Thursday, July 03, 2014 3:07 PM
To: r-help@r-project.org
Subject: [R] metafor package: changing decimal
in forest plot to midline
--
> > From: Dietlinde Schmidt [mailto:schmidt.dietli...@web.de]
> > Sent: Monday, July 07, 2014 10:09
> > To: Viechtbauer Wolfgang (STAT); r-help@r-project.org
> > Subject: Re: [R] metafor package: changing decimal in forest plot to
> > midline decimal
> >
> > Th
om: r-help-boun...@r-project.org [r-help-boun...@r-project.org] On Behalf Of
Dietlinde Schmidt [schmidt.dietli...@web.de]
Sent: Thursday, July 03, 2014 3:07 PM
To: r-help@r-project.org
Subject: [R] metafor package: changing decimal in forest plot to midline
decimal
Dear R-Community,
I need
olfgang (STAT); r-help@r-project.org
> Subject: Re: [R] metafor package: changing decimal in forest plot to
> midline decimal
>
> Thanks for that link, Wolfgang. Unfortunately, there comes the Warning
> with it:
> "(process:3634): Pango-WARNING **: Invalid UTF-8 string passe
Dietlinde Schmidt [schmidt.dietli...@web.de]
Sent: Thursday, July 03, 2014 3:07 PM
To: r-help@r-project.org
Subject: [R] metafor package: changing decimal in forest plot to midline
decimal
Dear R-Community,
I need to change the punctuation of the reported weights, effect sizes
and confidence in
Dear R-Community,
I need to change the punctuation of the reported weights, effect sizes
and confidence intervals in a forest plot created with the
forest()-function in the metafor-package.
Midline decimal means that it looks like this (23·6) rather than that
(23.6).
Do I need to change th
14 at 6:39 AM
To: "r-help@R-project.org" , "Nathan Leon Pace, MD,
MStat" , Michael Dewey , S
Ellison
Subject: RE: [R] metafor package
>Good advice already from Michael and S Ellison.
>
>I must apologize for the 'hack-job of a function' called forest() in
&
bound and lower than your lowest
confidence interval lower bound. The bars may run into the text, but
that may be fixed by stretching the output window in R.
Will Shadish
**
Date: Tue, 11 Feb 2014 22:11:20 +
From: Nathan Pace
To: "r-hel
> -Original Message-
> I must apologize for the 'hack-job of a function' called forest() in metafor.
Well, certainly no apology needed there!
> I realized a while ago that people would prefer more fine-grained control over
> the various elements of the plot (this has come up a few times
+31 (43) 388-4170 | http://www.wvbauer.com
> -Original Message-
> From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
> On Behalf Of Michael Dewey
> Sent: Wednesday, February 12, 2014 12:50
> To: Nathan Pace; r-help@R-project.org
> Subject: Re: [R
roject.org
> Subject: [R] metafor package
>
> Hi,
>
> I have a random effects meta analysis of a proportion (logit transformation)
> using rma.glmm.
>
> I have created a forest plot of the proportion (inverse logic transformation)
> using forest.rma.
>
> I have
At 22:11 11/02/2014, Nathan Pace wrote:
Hi,
I have a random effects meta analysis of a proportion (logit
transformation) using rma.glmm.
I have created a forest plot of the proportion (inverse logic
transformation) using forest.rma.
I have added the credibility interval.
The forest plot i
Hi,
I have a random effects meta analysis of a proportion (logit transformation)
using rma.glmm.
I have created a forest plot of the proportion (inverse logic transformation)
using forest.rma.
I have added the credibility interval.
The forest plot is saved as a pdf.
The dotted line and whisk
Original Message-
> > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
> > On Behalf Of Jarrett Byrnes
> > Sent: Friday, September 07, 2012 16:02
> > To: R help
> > Subject: [R] metafor package: study level variation
> >
> >
:r-help-boun...@r-project.org]
> > On Behalf Of Jarrett Byrnes
> > Sent: Friday, September 07, 2012 16:02
> > To: R help
> > Subject: [R] metafor package: study level variation
> >
> > Hello. A quick question about incorporating variation due to study in the
> > met
es
> Sent: Friday, September 07, 2012 16:02
> To: R help
> Subject: [R] metafor package: study level variation
>
> Hello. A quick question about incorporating variation due to study in the
> metafor package. I'm working with a particular data set for meta-analysis
&g
At 15:02 07/09/2012, Jarrett Byrnes wrote:
Hello. A quick question about incorporating variation due to study
in the metafor package. I'm working with a particular data set for
meta-analysis where some studies have multiple measurements. Others
do not. So, let's say the effect I'm looking a
Hello. A quick question about incorporating variation due to study in the
metafor package. I'm working with a particular data set for meta-analysis
where some studies have multiple measurements. Others do not. So, let's say
the effect I'm looking at is response to two different kinds of drug
1)
6200 MD Maastricht, The Netherlands
+31 (43) 388-4170 | http://www.wvbauer.com
> -Original Message-
> From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
> On Behalf Of Jeremy Miles
> Sent: Friday, August 03, 2012 04:01
> To: Bexkens, Anika
> Cc: r
The test of moderator coefficients (QM) is chi-square distributed.You
can use the change in this value when you add a predictor to the model
as a chi-square test, with df equal to the change in df.
Jeremy
On 2 August 2012 05:54, Bexkens, Anika wrote:
> Dear Metafor users,
>
> I'd like to test a
Dear Metafor users,
I'd like to test a model with 2 continuous and 2 categorical moderators in a
meta regression. One categorical parameter has 2 levels and the other has 4
levels. If I understand correctly, when I include all moderators in the model,
Metafor returns main effects of the continu
Thanks very much for your response. Sorry for writing to you directly.
Hereafter, I'll email to the R-Help list. I agree with all your comments and
suggestions. My analysis will be descriptive type; purely observational as the
studies are non-randomized studies. I have sample sizes and counts
Dear Dushanthi,
Please keep your e-mails on the R-Help list, where Michael has already given
you some excellent advice. As Michael already explained, metafor can handle
proportions, but does not have any specific functionality for categorical
variables with more than 2 levels (at the moment). S
help@r-project.org
> From: i...@aghmed.fsnet.co.uk
> Subject: RE: [R] "metafor" package, proportions: single groups wrt to a
> categorical dependent variable
>
> At 01:18 31/07/2012, Dushanthi Pinnaduwage wrote:
>
> >Thanks very much for the reply Michael.
>
) it is a bit hard to offer
more advice. I would regard collapsing categories as a last resort
myself as you lose information.
Dushanthi
> Date: Sat, 28 Jul 2012 16:38:24 +0100
> To: dushan...@bell.net; r-help@r-project.org
> From: i...@aghmed.fsnet.co.uk
> Subject: RE: [R] "
ried and the error message you got (if any) or told us the
> > > discrepancy between the output you obtained and that which you expected.
> >
> >
> >
> > > Date: Sat, 28 Jul 2012 14:25:08 +0100
> > > To: dushan...@bell.net; r-help@r-project.org
> > > F
ou got (if any) or told us the
> discrepancy between the output you obtained and that which you expected.
> Date: Sat, 28 Jul 2012 14:25:08 +0100
> To: dushan...@bell.net; r-help@r-project.org
> From: i...@aghmed.fsnet.co.uk
> Subject: Re: [R] "metafor" package, proporti
you obtained and that which you expected.
> Date: Sat, 28 Jul 2012 14:25:08 +0100
> To: dushan...@bell.net; r-help@r-project.org
> From: i...@aghmed.fsnet.co.uk
> Subject: Re: [R] "metafor" package, proportions: single groups
wrt to a categorical dependent variable
>
At 01:44 28/07/2012, Dushanthi Pinnaduwage wrote:
Dear all, I am using R version 2.15.0 and 'metafor' package version
1.6-0. Can this version of the package handle proportions from
a categorical dependent variable for single studies?If so how do I
set up my dataframe for the raw data from
Dear all, I am using R version 2.15.0 and 'metafor' package version 1.6-0. Can
this version of the package handle proportions from a categorical dependent
variable for single studies?If so how do I set up my dataframe for the raw data
from different studies? Also how do I give inputs, speci
tricht, The Netherlands
Tel: +31 (43) 368-5248
Fax: +31 (43) 368-8689
Web: http://www.wvbauer.com
Original Message
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf Of petre...@unina.it Sent: Monday, December 20, 2010 13:26
To: r-help@r-project.org
Subject:
I have some question about metafor package.
I'm interest to perform a random effect meta-analysis of proportion
(single group summary of prevalence of disease in a population as
reported by different study)
It ask:
1. "PFT": The Freeman-Tukey double arcsine transformed proportion is
repor
Thanks for the confirmation and pointer, Mike!
Dr. Viechtbauer, I'm looking forward to the new functionality of
specifying covariance structures in metafor().
Thanks both again for the great help,
Gang
On Sun, Feb 7, 2010 at 8:59 PM, Mike Cheung wrote:
> Dear Gang,
>
> It seems that it is poss
P.O. Box 616 Room B2.01 (second floor)
6200 MD Maastricht, The Netherlands Debyeplein 1 (Randwyck)
Original Message
From: r-help-boun...@r-project.org
[mailto:r-help-boun...@r-project.org] On Behalf Of Gang Chen Sent:
Friday, February 05, 2010 23:08 To: r-help@r-project.org
Sub
Dear Gang,
It seems that it is possible to use a univariate meta-analysis to
handle your multivariate effect sizes. If you want to calculate a
weighted average first, Hedges and Olkin (1985) has discussed this
approach.
Hedges, L. V., & Olkin, I. (1985). Statistical methods for
meta-analysis. Orl
Dear Gang,
Here are just some general thoughts. Wolfgang Viechtbauer will be a
better position to answer questions related to metafor.
For multivariate effect sizes, we first have to estimate the
asymptotic sampling covariance matrix among the effect sizes. Formulas
for some common effect sizes a
In a classical meta analysis model y_i = X_i * beta_i + e_i, data
{y_i} are assumed to be independent effect sizes. However, I'm
encountering the following two scenarios:
(1) Each source has multiple effect sizes, thus {y_i} are not fully
independent with each other.
(2) Each source has multiple e
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