Thank you for your help! On Mon, Dec 7, 2009 at 9:53 AM, Viechtbauer Wolfgang (STAT) < wolfgang.viechtba...@stat.unimaas.nl> wrote:
> If you just want a forest plot, then the forest() function. > > If you have the betas and corresponding variances, then you can create a > forest plot with: > > forest(betas, varbetas) > > And yes, estimate +/- 1.96*sqrt(variance of estimate) would be an > *approximate* 95% CI. > > Best, > > -- > Wolfgang Viechtbauer http://www.wvbauer.com/ > Department of Methodology and Statistics Tel: +31 (0)43 388-2277 > School for Public Health and Primary Care Office Location: > Maastricht University, P.O. Box 616 Room B2.01 (second floor) > 6200 MD Maastricht, The Netherlands Debyeplein 1 (Randwyck) > > > ----Original Message---- > From: Xin Ge [mailto:xingemaill...@gmail.com] > Sent: Sunday, December 06, 2009 00:40 > To: Viechtbauer Wolfgang (STAT) > Cc: r-help@r-project.org > Subject: Re: [R] Forest Plot > > > Thanks for your reply. Which function I should explore in "metafor" > > package for this kind of plot. > > > > Also I have to do a forest plot for "regressions estimates" (betas) > > and corresponding "sqrt(var)". I hope in this case there is no > > difference between std. error and std. deviation? So, a 95% > > confidence interval would be [estimate +/- 1.96*sqrt(variance of > > estimate)]. Am I correct in saying this? > > > > Thanks again, > > Xin > > > > > > On Sat, Dec 5, 2009 at 6:21 PM, Viechtbauer Wolfgang (STAT) > > <wolfgang.viechtba...@stat.unimaas.nl> wrote: > > > > The figure that you linked to was produced with the "metafor" > > package. It can also be used to produce a forest plot if you have > > means and corresponding standard errors of the means. The standard > > error of a mean is equal to SD / sqrt(n), so as long as you also know > > the sample sizes (n), you can convert those standard deviations to > > the standard errors. > > > > Best, > > > > -- > > Wolfgang Viechtbauer http://www.wvbauer.com/ > > Department of Methodology and Statistics Tel: +31 (0)43 388-2277 > > School for Public Health and Primary Care Office Location: > > Maastricht University, P.O. Box 616 Room B2.01 (second floor) > > 6200 MD Maastricht, The Netherlands Debyeplein 1 (Randwyck) > > ________________________________________ > > From: r-help-boun...@r-project.org [r-help-boun...@r-project.org] On > > Behalf Of Xin Ge [xingemaill...@gmail.com] > > Sent: Sunday, December 06, 2009 12:11 AM > > To: r-help@r-project.org > > Subject: [R] Forest Plot > > > > > > Hi All, > > > > I want to produce a similar "Forest Plot" as it is on the following > > link, but my data would be having only two columns (one for > > "Estimate" and other for "Std. Dev"). Can anyone suggest some > > function() {Package} which can take such file as an input and give > > following forest plot: > > > > > http://bm2.genes.nig.ac.jp/RGM2/R_current/library/metafor/man/images/big_plot.rma.uni_001.png > > > > Thanks, > > Xin > > ______________________________________________ > 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<http://www.r-project.org/posting-guide.html> > and provide commented, minimal, self-contained, reproducible code. > [[alternative HTML version deleted]] ______________________________________________ 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.
