.cmicalc is a non-exported function. You can see the code with: getAnywhere(.cmicalc)
Best, Wolfgang > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] > On Behalf Of petre...@unina.it > Sent: Thursday, November 21, 2013 13:39 > To: r-help@r-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 and ??.cmicalc) but > I have no result. Please, can I have further explanation on this point? > > Sorry for the trouble > > Sincerely > > Mario Petretta > Department of Translational Medical Sciences > Naples University Federico II > Italy > > > > Message: 50 > Date: Tue, 19 Nov 2013 11:48:33 +0100 > From: "Viechtbauer Wolfgang (STAT)" > <wolfgang.viechtba...@maastrichtuniversity.nl> > 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: > <077E31A57DA26E46AB0D493C9966AC730D9925568A@UM- > MAIL4112.unimaas.nl> > Content-Type: text/plain; charset="us-ascii" > > Dear Mario, > > You can always just inspect the code: > > escalc.default > > Best, > Wolfgang > > -- > Wolfgang Viechtbauer, Ph.D., Statistician > Department of Psychiatry and Psychology > School for Mental Health and Neuroscience > Faculty of Health, Medicine, and Life Sciences > Maastricht University, P.O. Box 616 (VIJV1) > 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 petre...@unina.it > > Sent: Tuesday, November 19, 2013 11:29 > > To: r-help@r-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 at: > > > > http://r.789695.n4.nabble.com/using-metafor-for-meta-analysis-of-before- > > after-studies-escalc-SMCC-td4667233.html > > > > but it is unclear for me the formula used to derive y1 and v1. I read > > the documentation of metafor package and it is all very well > > described, but I ask if possible for the formula used by > > escalc(measure="SMCC") to mathematically calculate yi and vi. > > Unfortunatel, I have no free access to the paper quoted in metafor > > package. > > > > Beginning example: > > > > fMRS > > author year n mean_r sd_r mean_s sd_s r > > 1 Tom 2006 9 0 0 0.12 0.03 0 0 > > 2 Jack 2012 6 0 0 0.23 0.05 0 0 > > 3 Zhu 2013 8 0 0 0.18 0.05 0 0 > > > > > > > > dat_SMCC=escalc(measure="SMCC",data=fMRS,ni=n,m1i=mean_s,m2i=mean_r,sd1i=s > > d_s,sd2i=sd_r,ri=r > > ,append=TRUE) > > > dat_SMCC > > author year n mean_r sd_r mean_s sd_s r yi vi > > 1 Tom 2006 9 0 0 0.12 0.03 0 3.6108 0.8354 > > 2 Jack 2012 6 0 0 0.23 0.05 0 3.8674 1.4131 > > 3 Zhu 2013 8 0 0 0.18 0.05 0 3.1975 0.7640 > > > > > > > > Sincerely > > > > -- > > Mario Petretta > > Department of Translational Medical Sciences > > Naples University Federico II > > Italy > > > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting- > guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.