Hello, I once used the metawin software to perform a meta-analysis (see metawinsoft, Rosenberg et al.) and produced normal qqplot to test for a potential bias in the dataset. I now want to re-use the same dataset with the package metafor by W. Viechtbauer (great package btw).
I run the qqnorm.rma.uni function. I use standardized effect sizes as in metawin. QQplot generated with metafor differs from the plot obtained with metawin: most of the datapoint fall outside the confidence envelope (using the same confidence level). I don't understand very well how the "pseudo confidence envelope" was created in metafor. Is it more conservative than that from metawin or created using the package envelope ? Unfortunately I do not have access to metawin's code so that I cannot compare implementations but the manual let me think that metawin print classical confidence interval... Thanks for input ! Ricc More precisions: R version 2.13.1 (2011-07-08) Platform: x86_64-pc-linux-gnu (64-bit) metafor_1.6-0 ______________________________________________ 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.
