Dear Hugh
1 - Your post is unreadable because you posted in HTML so it will be
very difficult for anyone to see your V
2 - there is a separate mailing list for meta-analysis in R where you
may get more helpful responses as it is monitored by authors of most of
the main packages. Please see
This may be a very simple fix, but I am struggling to reproduce Becker's (1988)
imputation of control group effect sizes for single group trials. For some
reason that I cannot figure out, I am getting an "All list elements in 'V' must
be square matrices". Below is my V matrix, which I believe
Dear Laura
If you are unable for some reason to share the data why not incorporate
the output into an e-mail (and please turn of HTML as it mangles
everything). Putting the plots from profiling somewhere we can read them
would be a useful addition.
This looks at first glance one of those
-help@r-project.org
>Subject: [R] Metafor multilevel metaregression: total variance increases
>when moderator added?
>
>Hi there,
>
>I am running a two level multilevel meta-regression of 170 estimates
>nested within 3 informants nested within 26 studies. I run the null mod
Hi there,
I am running a two level multilevel meta-regression of 170 estimates nested
within 3 informants nested within 26 studies. I run the null model to get a
pooled estimate with random effects at the informant level and study level.
Then I test a series of potential moderators (one at a
616 (VIJV1) | 6200 MD
Maastricht, The Netherlands | +31 (43) 388-4170 | http://www.wvbauer.com
>-Original Message-
>From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Duncan,
>Laura
>Sent: Monday, January 30, 2017 18:18
>To: r-help@r-project.org
>Su
Hi there,
Question:
Does the rma.mv command in metafor automically adjust the weights to account
for multiple effect sizes within study or do these weights need to manually
calculated and applied?
Details:
In setting up a multilevel meta-analysis and meta-regression with multiple
effect
Dear Kathryn
I think that the author of metafor has addressed this
http://www.metafor-project.org/doku.php/tips:comp_two_independent_estimates
The other tips on that site are well worth reading too.
On 29/07/2016 14:44, Morris, Kathryn wrote:
I am running a meta-analysis using metafor and
I think you should consult with a local statistician. Generally
speaking, statistical questions like this tend to be OT here, and you
appear to be sufficiently confused about the statistical issues that
online posts would not be sufficient.
Cheers,
Bert
Bert Gunter
"The trouble with having an
I am running a meta-analysis using metafor and getting what seem to be
conflicting results.
#analysis with species moderator
cropMeta.species<-rma(cropyi, cropvi, data=dataCropMeta,
mods=~dataCropMeta$species - 1, method="HE")
The output for the analysis using species as a moderator shows
n 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
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, similar to the previous m
hology | 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: Monday, December 07, 2015 22:14
>
terson [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 includes
&g
rom: 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 using the metafor package. I am
> inte
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
: Viechtbauer Wolfgang (STAT)
[mailto:wolfgang.viechtba...@maastrichtuniversity.nl]
Gesendet: Freitag, 27. November 2015 16:01
An: Markus Kösters; 'Michael Dewey'; r-help@r-project.org
Betreff: RE: [R] metafor - Meta-Analysis of rare events / beta-binomial
regression
I would say the issue of how
Dear Markus
This is not a direct answer to your question, I will leave that to
Wolfgang but two thoughts:
1 - if all the studies have very sparse data
@article{bradburn07,
author = {Bradburn, M J and Deeks, J J and Berlin, J A and Localio,
A R},
title = {Much ado about nothing: a
]
Gesendet: Freitag, 27. November 2015 13:32
An: Markus Kösters; r-help@r-project.org
Betreff: Re: [R] metafor - Meta-Analysis of rare events / beta-binomial
regression
Dear Markus
This is not a direct answer to your question, I will leave that to Wolfgang but
two thoughts:
1 - if all the studies
Behalf Of Markus
> Kösters
> Sent: Friday, November 27, 2015 14:38
> To: 'Michael Dewey'; r-help@r-project.org
> Subject: Re: [R] metafor - Meta-Analysis of rare events / beta-binomial
> regression
>
> Dear Michael,
>
> Thank you very much for your input, that is very much app
Dear all,
I am currently writing a protocol for a meta-analysis which will analyze
suicidal events. Recently, O. Kuss has (DOI 10.1002/sim.6383) published a
paper that suggest using beta-binomial regression methods to incorporate
double-zero studies. He states that �Methods that ignore
ttp:///user/SendEmail.jtp?type=node=4711682=1>
Subject: Re: [R] Metafor and forest(); not showing 'ilab' and text
The solution that you proposed works perfectly, thank you very much.
I'll wait for Wolfgang answer as I'm having few doubts about the models.
Thanks
On 31 August 2015 at 18:34, Michae
psychology | Maastricht University | P.O. Box 616 (VIJV1) | 6200 MD
> Maastricht, The Netherlands | +31 (43) 388-4170 | http://www.wvbauer.com
>
>> -Original Message-
>> From: Marco Colagrossi [mailto:marco.colagro...@gmail.com]
>> Sent: Monday, August 31, 2015 18:37
to create a nice
>>> looking plot that has no overlapping text and no excessive white space. An
>>> example is this:
>>>
>>> http://www.metafor-project.org/doku.php/plots:forest_plot_with_subgroups
>>>
>>> Note that it took me dozens of iteratio
nal Message-
From: Marco Colagrossi [mailto:marco.colagro...@gmail.com]
Sent: Tuesday, August 25, 2015 17:59
To: Viechtbauer Wolfgang (STAT)
Cc: r-help@r-project.org; Michael Dewey
Subject: Re: [R] Metafor and forest(); not showing 'ilab' and text
Thanks again for your help. I'm sorry to b
;> estimates and their CIs. Within that space, you can then add additional
>>>>> columns with the 'ilab' argument. It's up to you to find an appropriate
>>>>> combination of plotting device width, character/symbol expansion factor
>>>>>
lfgang (STAT); r-help@r-project.org
> Subject: Re: [R] Metafor and forest(); not showing 'ilab' and text
>
> The solution that you proposed works perfectly, thank you very much.
>
> I'll wait for Wolfgang answer as I'm having few doubts about the models.
>
> Thanks
>
> On 3
> Sent: Monday, August 31, 2015 18:37
> > To: Michael Dewey
> > Cc: Viechtbauer Wolfgang (STAT); [hidden email]
> <http:///user/SendEmail.jtp?type=node=4711682=1>
> > Subject: Re: [R] Metafor and forest(); not showing 'ilab' and text
> >
> > The solution that
Message-
From: Marco Colagrossi [mailto:marco.colagro...@gmail.com]
Sent: Tuesday, August 25, 2015 17:59
To: Viechtbauer Wolfgang (STAT)
Cc: r-help@r-project.org; Michael Dewey
Subject: Re: [R] Metafor and forest(); not showing 'ilab' and text
Thanks again for your help. I'm sorry to bother
...@dewey.myzen.co.uk]
Sent: Tuesday, August 25, 2015 13:23
To: Marco Colagrossi; Viechtbauer Wolfgang (STAT)
Cc: r-help@r-project.org
Subject: Re: [R] Metafor and forest(); not showing 'ilab' and text
Hello Marco
Comments in line again
On 24/08/2015 18:49, Marco Colagrossi wrote:
I tried to upload
To: Viechtbauer Wolfgang (STAT)
Cc: r-help@r-project.org; Michael Dewey
Subject: Re: [R] Metafor and forest(); not showing 'ilab' and text
Thanks again for your help. I'm sorry to bother you but I don't get
how to widen the forest plot; if I try to change the values of xlim or
the ilab.xpos values
Further comments in line as well.
-Original Message-
From: Michael Dewey [mailto:li...@dewey.myzen.co.uk]
Sent: Tuesday, August 25, 2015 13:23
To: Marco Colagrossi; Viechtbauer Wolfgang (STAT)
Cc: r-help@r-project.org
Subject: Re: [R] Metafor and forest(); not showing 'ilab
-project.org] On Behalf Of Marco
Colagrossi
Sent: Monday, August 24, 2015 16:04
To: r-help@r-project.org
Subject: [R] Metafor and forest(); not showing 'ilab' and text
Hello folks,
I have a couple of issues with the metafor package, specifically with
the forest graphs.
I am currently conducting a Meta
Maastricht, The Netherlands | +31 (43) 388-4170 | http://www.wvbauer.com
-Original Message-
From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of Marco
Colagrossi
Sent: Monday, August 24, 2015 16:04
To: r-help@r-project.org
Subject: [R] Metafor and forest
Hello folks,
I have a couple of issues with the metafor package, specifically with
the forest graphs.
I am currently conducting a Meta-Analysis in economics throughout the
metafor package.
My meta-analysis has the specific of having different cases from
single studies, and this proven to be
Dear Marco
Comments inline
On 24/08/2015 15:03, Marco Colagrossi wrote:
Hello folks,
I have a couple of issues with the metafor package, specifically with
the forest graphs.
I am currently conducting a Meta-Analysis in economics throughout the
metafor package.
My meta-analysis has the
[mailto:r-help-boun...@r-project.org] On Behalf Of Marco
Colagrossi
Sent: Monday, August 24, 2015 16:04
To: r-help@r-project.org
Subject: [R] Metafor and forest(); not showing 'ilab' and text
Hello folks,
I have a couple of issues with the metafor package, specifically with
the forest graphs
, v, random = list(~ 1 | y, ~ 1 | ID), sigma2=c(0,NA),
data=dat)
anova(model2,model3)
anova(model2,model4)
Is it possible to receive the standard errors of the variances in metafor (and
do a Z-test)?
To: wibbelt...@hotmail.com; r-help@r-project.org
Subject: Re: [R] Metafor - rma.mv function
...@dewey.myzen.co.uk; r-help@r-project.org
Subject: Re: [R] Metafor - rma.mv function - variance components
Thank you for your reaction, it worked.
However, I'm wondering if this is the right way to test whether there is
significant variation on one of the two levels. The results of the anova
of the variances in
metafor (and do a Z-test)?
To: wibbelt...@hotmail.com; r-help@r-project.org
Subject: Re: [R] Metafor - rma.mv function - variance components
From: li...@dewey.myzen.co.uk
Date: Mon, 20 Apr 2015 20:24:48 +
Carlijn Wibbelink wibbelt...@hotmail.com wrote :
Dear Carlijn
Carlijn Wibbelink wibbelt...@hotmail.com wrote :
Dear Carlijn
I think that if you set sigma2 to a vector of length 2 it will be possible.
Hi all,
I have a question about metafor and the rma.mv function. I have fitted a
multivariate model (effect sizes are nested within studies) and I've
Hi all,
I have a question about metafor and the rma.mv function. I have fitted a
multivariate model (effect sizes are nested within studies) and I've found two
variances:
Variance Components:
estimsqrt nlvls fixed factor
sigma^2.1 0.0257 0.1602 72 no
Hi, I have a quesite on meta-analysis with 'metafor'.
I would like to calculate the standardized mean difference (SMD), as
Hedges' g, in pre-post design studies.
I have data on baseline (sample size, mean and SD in both the
experimental
and the control group) and at end of treatment (same as
Comment below
On 13/04/2015 20:46, Antonello Preti wrote:
Hi, this is another quesite related to the use of 'metafor' for calculation
of standardized mean change in pre-post design studies.
Essentially, my aim is to compare different method to arrive at the same
conclusion: Does the treatment
Hi, I have a quesite on meta-analysis with 'metafor'.
I would like to calculate the standardized mean difference (SMD), as
Hedges' g, in pre-post design studies.
I have data on baseline (sample size, mean and SD in both the experimental
and the control group) and at end of treatment (same as
Hi, this is another quesite related to the use of 'metafor' for calculation
of standardized mean change in pre-post design studies.
Essentially, my aim is to compare different method to arrive at the same
conclusion: Does the treatment work?
The Cochrane manual advise not to calculate change
To: Michael Dewey; Purssell, Ed; r-help@r-project.org
Subject: RE: [R] metafor - code for analysing geometric means
With geometric mean 1 CI /3.92, I assume you mean (upper bound - lower
bound) / 3.92. Two things:
1) That will give you the SE of the mean, not the SD of the observations (which
is what
: RE: [R] metafor - code for analysing geometric means
With geometric mean 1 CI /3.92, I assume you mean (upper bound - lower
bound) / 3.92. Two things:
1) That will give you the SE of the mean, not the SD of the observations
(which is what you need as input).
2) Probably the CI
Dewey
Sent: Thursday, November 13, 2014 12:36
To: Purssell, Ed; r-help@r-project.org
Subject: Re: [R] metafor - code for analysing geometric means
On 13/11/2014 11:00, Purssell, Ed wrote:
?Dear All
I have some data expressed in geometric means and 95% confidence
intervals. Can I code
?Dear All
I have some data expressed in geometric means and 95% confidence intervals.
Can I code them in metafor as:
rma(m1i=geometric mean 1, m2i=geometric mean 2, sd1i=geometric mean 1 CI /3.92,
sd2i=geometric mean 2 CI/3.92...etc, measure=MD)
All of the studies use geometric means.
On 13/11/2014 11:00, Purssell, Ed wrote:
?Dear All
I have some data expressed in geometric means and 95% confidence intervals.
Can I code them in metafor as:
rma(m1i=geometric mean 1, m2i=geometric mean 2, sd1i=geometric mean 1 CI /3.92,
sd2i=geometric mean 2 CI/3.92...etc,
...@maastrichtuniversity.nl] Sent: 27
August 2014 17:30 To: Owen, Branwen; r-help@r-project.org Subject:
RE: [R] Metafor -can't calculate heterogeneity with non-positive
sampling variances The warning message pretty much says it: When one
of the variances is zero, then the I^2 statistic (and various other
Hi, I'm doing a meta-analysis in metafor. All is fine except when there are 0s
in the values that i'm pooling, then i get a pooled estimate but not the I2
that i am also interested in.
for example:
summary(rma.1-rma(yi,vi,data=mix,method=ML,knha=F,weighted=F,intercept=T))
(where yi are the
=0 is really sensible.
Best,
Wolfgang
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
On Behalf Of Owen, Branwen
Sent: Wednesday, August 27, 2014 13:48
To: r-help@r-project.org
Subject: [R] Metafor -can't calculate heterogeneity with non
Subject: RE: [R] Metafor -can't calculate heterogeneity with non-positive
sampling variances
The warning message pretty much says it: When one of the variances is zero,
then the I^2 statistic (and various other things) cannot be computed, at least
if one sticks to the usual equations/methods. So
guess it's a font issue. There may be others that can give more useful
advice.
Best,
Wolfgang
-Original Message-
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
] 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 to change the punctuation of the reported weights, effect sizes
-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 passed to
pango_layout_set_text()
and decimal being
-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 change the punctuation
] 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 change the punctuation of the reported weights, effect sizes
[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 intervals
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
Hey guys,
I have tested the metafor trim and fill function (y:SD, x:SMD)on my data
set and yielded the following result:
1. missing studies on the right: 34
2. open circles on the rights side appear to be the number of additional
effects
3. adjusted d would be higher than observed d.
Since
-Original Message-
From: Verena Weinbir [mailto:vwein...@gmail.com]
Sent: Tuesday, May 06, 2014 15:09
To: Michael Dewey
Cc: Viechtbauer Wolfgang (STAT);
mailto:r-help@r-project.orgr-help@r-project.org
Subject: Re: [R] Metafor: How to integrate effectsizes?
Thank you very much
At 09:34 26/05/2014, Verena Weinbir wrote:
Hey guys,
I have tested the metafor trim and fill function (y:SD, x:SMD)on my data
set and yielded the following result:
1. missing studies on the right: 34
That seems a lot of missing studies unless you have a very large set
of primary studies.
thanks for your reply, Michael!
ad primary studies:
yup, I have a large set of studies: At the moment I consider 126 data sets
in my analysis.
ad interpretation:
thats an interesting information. But usually there should be found an
effect.
ad bit :-):
I am irritiated, because in the plots I
Dewey
Cc: r-help
Subject: Re: [R] Metafor: Strange Trim and Fill Outcome?
thanks for your reply, Michael!
ad primary studies:
yup, I have a large set of studies: At the moment I consider 126 data sets
in my analysis.
ad interpretation:
thats an interesting information. But usually there should
From: r-help-boun...@r-project.org [r-help-boun...@r-project.org] On
Behalf Of Verena Weinbir [vwein...@gmail.com]
Sent: Monday, May 26, 2014 1:15 PM
To: Michael Dewey
Cc: r-help
Subject: Re: [R] Metafor: Strange Trim and Fill Outcome?
thanks for your
Hey,
I want to build a forest plot which states author and year for a subset of
studies.
But if I use this argument:
resultREML - rma(yi=yi, vi=vi, method = REML,
data = subset(empa, task==x))
resultREML
forest(resultREML, , slab=paste(empa$author, empa$year,sep = ,))
I
-help
Subject: [R] Metafor: forest plot for subset
Hey,
I want to build a forest plot which states author and year for a subset
of
studies.
But if I use this argument:
resultREML - rma(yi=yi, vi=vi, method = REML,
data = subset(empa, task==x))
resultREML
forest
-help@r-project.org
Subject: Re: [R] Metafor: How to integrate effectsizes?
Thank you very much for your illustration, Wolfgang! It helped me a
lot.Ã And also thank you for the package-hint, Michael!
Now, I have re-checked the respective studies, and there still are a
couple
).
Best,
Wolfgang
-Original Message-
From: Verena Weinbir [mailto:vwein...@gmail.com]
Sent: Tuesday, May 06, 2014 15:09
To: Michael Dewey
Cc: Viechtbauer Wolfgang (STAT); r-help@r-project.org
Subject: Re: [R] Metafor: How to integrate effectsizes?
Thank you very much for your
, April 25, 2014 16:23
To: Verena Weinbir
Cc: r-help@r-project.org
Subject: Re: [R] Metafor: How to integrate effectsizes?
At 12:33 25/04/2014, you wrote:
Thank you very much for your reply and the book recommendation,
Michael.
Yes, I mean Cohen's d - sorry for the typo :-)
Just
, 2014 15:09
To: Michael Dewey
Cc: Viechtbauer Wolfgang (STAT); r-help@r-project.org
Subject: Re: [R] Metafor: How to integrate effectsizes?
Thank you very much for your illustration, Wolfgang! It helped me a
lot. And also thank you for the package-hint, Michael!
Now, I have re-checked
-project.org
Subject: Re: [R] Metafor: How to integrate effectsizes?
At 12:33 25/04/2014, you wrote:
Thank you very much for your reply and the book recommendation, Michael.
Yes, I mean Cohen's d - sorry for the typo :-)
Just to make this sure for me: There is no
possibility to integrate
At 13:15 24/04/2014, Verena Weinbir wrote:
Hello!
I am using the metafor package for my master's thesis as an R-newbie. While
calculating effectsizes from my dataset (mean values and
standarddeviations) using escalc shouldn't be a problem (I hope ;-)), I
wonder how I could at this point
At 12:33 25/04/2014, you wrote:
Thank you very much for your reply and the book recommendation, Michael.
Yes, I mean Cohen's d - sorry for the typo :-)
Just to make this sure for me: There is no
possibility to integrate stated Cohens' ds in an
R-Metaanalysis (or a MA at all), if there is no
-project.org]
On Behalf Of Michael Dewey
Sent: Friday, April 25, 2014 16:23
To: Verena Weinbir
Cc: r-help@r-project.org
Subject: Re: [R] Metafor: How to integrate effectsizes?
At 12:33 25/04/2014, you wrote:
Thank you very much for your reply and the book recommendation, Michael.
Yes, I
At 11:56 22/04/2014, Dipl. Kfm Dominik Wagner MSc; MSc wrote:
Dear all,
I am quite new to R. Now my following easy question.
I use metafor and performed an outlier test with rstudent(res).
This is resulting in 1000 rows of 1578 and 578 omitted rows (starting with
row 598).
1. How can I
Hello!
I am using the metafor package for my master's thesis as an R-newbie. While
calculating effectsizes from my dataset (mean values and
standarddeviations) using escalc shouldn't be a problem (I hope ;-)), I
wonder how I could at this point integrate additional studies, which only
state
-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
On Behalf Of Dipl. Kfm Dominik Wagner MSc; MSc
Sent: Tuesday, April 22, 2014 12:56
To: r-help@r-project.org
Subject: [R] metafor - rstudent(res) - omitted rows
Dear all,
I am quite new to R. Now my following easy question
Williams
Sent: Tuesday, April 08, 2014 02:30
To: r-help@r-project.org
Subject: [R] {metafor} variance explaination for paired pre-test/posttest
In a previous post
https://stat.ethz.ch/pipermail/r-help/2012-April/308946.html
https://stat.ethz.ch/pipermail/r-help/2012-April/308946.html
Prof. Viechtbauer, thanks for the articles. I appreciate your help.
Yours,
John
John Williams
ALB Candidate, Harvard University (Expected May 2014)
johnwilli...@fas.harvard.edu
jawilliam...@gmail.com
--
View this message in context:
In a previous post
https://stat.ethz.ch/pipermail/r-help/2012-April/308946.html
https://stat.ethz.ch/pipermail/r-help/2012-April/308946.html , the
following calculation was given for imputing the variance of change scores
for paired studies:
// begin quote
2) Often, the dependent variable is
Dear All
I have a question about combining effect sizes generated by escalc in metafor.
I realise these may be stupid things to do; but they are deliberately so to
explain what I mean - I don't intend doing this!
I have 3 studies; each of which has a different measure of effect/presents the
At 09:42 30/03/2014, Purssell, Ed wrote:
Dear All
I have a question about combining effect sizes generated by escalc
in metafor. I realise these may be stupid things to do; but they
are deliberately so to explain what I mean - I don't intend doing this!
I have 3 studies; each of which
Dear All
As you can specify the data directly to rma.uni via n1i, m1i, sd1i, etc in
Metafor, why would you ever want to use escalc to calculate yi and vi? Aren't
these just intermediate steps to the final pooled effect size which is
calculated by rma.uni; or is there some advantage to
] On Behalf Of
Purssell, Ed [ed.purss...@kcl.ac.uk]
Sent: Friday, March 14, 2014 10:11 AM
To: r-help@r-project.org
Subject: [R] Metafor - why use escalc?
Dear All
As you can specify the data directly to rma.uni via n1i, m1i, sd1i, etc in
Metafor, why would you ever want to use escalc to calculate yi
Date: Wednesday, February 12, 2014 at 6:39 AM
To: r-help@R-project.org r-help@r-project.org, Nathan Leon Pace, MD,
MStat n.l.p...@utah.edu, Michael Dewey i...@aghmed.fsnet.co.uk, S
Ellison s.elli...@lgcgroup.com
Subject: RE: [R] metafor package
Good advice already from Michael and S Ellison.
I must
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
, specifying lwd=2 in your forest call will give all the lines
width 2 instead of the default.
S Ellison
-Original Message-
From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org]
On Behalf Of Nathan Pace
Sent: 11 February 2014 22:11
To: r-help@R-project.org
Subject: [R
) 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] metafor package
At 22:11 11/02
-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
-project.org
Subject: [R] metafor package
Message-ID: cf1fef68.2490a%n.l.p...@utah.edu
Content-Type: text/plain
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
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
r-help@r-project.org
Subject: Re: [R] metafor escalc(measure=SMCC)
Message-ID:
077e31a57da26e46ab0d493c9966ac730d99255...@um-mail4112.unimaas.nl
Content-Type: text/plain; charset=us-ascii
.cmicalc is a non-exported function. You can see the code with:
getAnywhere(.cmicalc)
Best
To: petre...@unina.it petre...@unina.it, r-help@r-project.org
r-help@r-project.org
Subject: Re: [R] metafor escalc(measure=SMCC)
Message-ID:
077e31a57da26e46ab0d493c9966ac730d99255...@um-mail4112.unimaas.nl
Content-Type: text/plain; charset=us-ascii
Dear Mario,
You can always just
-project.org
Subject: [R] metafor escalc(measure=SMCC)
Many thanks to Wolfgang Viechtbauer for the prompt and clear answer.
However, I'm unable to understand what .cmicalc mathematically does in the
code line:
cmi - .cmicalc(mi)
I look in the metafor documentation and in R (?.cmical
Dear all,
I use R 3.0 for Windows.
I ask how escalc(measure=SMCC) [metafor package] mathematically
calculate yi and vi when only change score and SD change score are
provided.
I used the example (repoted below) posted by Qiang Yue at:
-project.org
Subject: [R] metafor escalc(measure=SMCC)
Dear all,
I use R 3.0 for Windows.
I ask how escalc(measure=SMCC) [metafor package] mathematically
calculate yi and vi when only change score and SD change score are
provided.
I used the example (repoted below) posted by Qiang Yue
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