Re: [R] help: forest plots
If you have the bounds of a 95% CI in the form of: exponential(estimate +/- 1.96*SE) then it is easy to get the SE back: SE = (log(UL) - log(LL)) / (2*1.96) Then supply the estimates and the SEs to the forest() function: forest(estimate, sei=SE) You can use: forest(estimate, sei=SE, transf=exp) if you want to exponentiate the estimates and CI bounds. Alternatively, you can use: forest(estimate, sei=SE, atransf=exp) to exponentiate the x-axis values. Best, -- Wolfgang Viechtbauerhttp://www.wvbauer.com/ Department of Methodology and StatisticsTel: +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: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Kim Jung Hwa Sent: Monday, December 14, 2009 05:22 To: C.H. Cc: r-help@r-project.org Subject: Re: [R] help: forest plots Thanks for this link. It helps, but I have to make lots of forest plots and these R scripts are not generic. Are you aware of similar functions as forest(), which can take input in the form of estimates, lower_limit, upper_limit? Thanks a lot! ~Kim On Sun, Dec 13, 2009 at 8:12 PM, C.H. chainsawti...@gmail.com wrote: This one does required the metafor package. http://tables2graphs.com/doku.php?id=04_regression_coefficients On Mon, Dec 14, 2009 at 8:13 AM, Kim Jung Hwa kimhwamaill...@gmail.com wrote: Hi All, I'm fitting a Poisson regression. And I want to plot 95% Confidence Interval of Regression Estimates. After coming back to original scale (using following formula): exponential(estimate +/- 1.96*SE), at best I can get the output in the form of estimates, lower_limit, upper_limit values. As far I know forest() in metafor package needs input in the form of estimates and their variances. In the above case can I still use forest()? OR if there exists some other function which takes such input and gives forest plots? Any help would be highly appreciated, Thanks, Kim __ 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.
Re: [R] help: forest plots
This one does required the metafor package. http://tables2graphs.com/doku.php?id=04_regression_coefficients On Mon, Dec 14, 2009 at 8:13 AM, Kim Jung Hwa kimhwamaill...@gmail.com wrote: Hi All, I'm fitting a Poisson regression. And I want to plot 95% Confidence Interval of Regression Estimates. After coming back to original scale (using following formula): exponential(estimate +/- 1.96*SE), at best I can get the output in the form of estimates, lower_limit, upper_limit values. As far I know forest() in metafor package needs input in the form of estimates and their variances. In the above case can I still use forest()? OR if there exists some other function which takes such input and gives forest plots? Any help would be highly appreciated, Thanks, Kim [[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. -- CH Chan Research Assistant - KWH http://www.macgrass.com __ 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.
Re: [R] help: forest plots
Thanks for this link. It helps, but I have to make lots of forest plots and these R scripts are not generic. Are you aware of similar functions as forest(), which can take input in the form of estimates, lower_limit, upper_limit? Thanks a lot! ~Kim On Sun, Dec 13, 2009 at 8:12 PM, C.H. chainsawti...@gmail.com wrote: This one does required the metafor package. http://tables2graphs.com/doku.php?id=04_regression_coefficients On Mon, Dec 14, 2009 at 8:13 AM, Kim Jung Hwa kimhwamaill...@gmail.com wrote: Hi All, I'm fitting a Poisson regression. And I want to plot 95% Confidence Interval of Regression Estimates. After coming back to original scale (using following formula): exponential(estimate +/- 1.96*SE), at best I can get the output in the form of estimates, lower_limit, upper_limit values. As far I know forest() in metafor package needs input in the form of estimates and their variances. In the above case can I still use forest()? OR if there exists some other function which takes such input and gives forest plots? Any help would be highly appreciated, Thanks, Kim [[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.htmlhttp://www.r-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. -- CH Chan Research Assistant - KWH http://www.macgrass.com [[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.
