@ Micheal: thanks I understand now. @ Wolfgang: apparently, using the DL-estimator solved my issue and leaded to a result with only a slight difference with metawin. thanks !
2012/1/17 Michael Dewey <i...@aghmed.fsnet.co.uk>: > At 12:15 16/01/2012, Ricc wrote: >> >> Hello, >> I used the default parameters: >> - envelope: default is TRUE >> - level: the default is to take the value from the object (I do not >> understand this very well) > > > When you specified your original model to rma.uni you either specified the > level or let it default (to 95). That value is stored in the object returned > by rma.uni and used by qqnorm.rma.uni unless you override it. You can see > what is in the object returned by rma.uni by using str. > > >> - bonferroni : no >> - reps : default is 1000 >> - smooth: default is TRUE >> - bass : default is 0 >> >> I used no other arguments. >> >> >> 2012/1/13 Michael Dewey <i...@aghmed.fsnet.co.uk>: >> > At 15:53 11/01/2012, Ricc wrote: >> >> >> >> 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. >> > >> > >> > I think it would help if you said which parameters you used to control >> > the >> > envelope. Did you smooth it? Did you use the Bonferroni correction? >> > >> > >> > >> >> 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 >> > >> > >> > Michael Dewey >> > i...@aghmed.fsnet.co.uk >> > http://www.aghmed.fsnet.co.uk/home.html >> > > > > Michael Dewey > i...@aghmed.fsnet.co.uk > http://www.aghmed.fsnet.co.uk/home.html > ______________________________________________ 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.
