The function funnel is generic. It can be used to create funnel plots.
Usage
funnel(x, ...)
Arguments
x
an object of class "rma".
...
other arguments.
Details
Currently, there is only a method for handling objects of class "rma" with the funnel function. Accordingly, the corresponding method is called funnel.rma. See the documentation for that function for more details.
References
Light, R. J., & Pillemer, D. B. (1984). Summing up: The science of reviewing research. Cambridge, MA: Harvard University Press.
Sterne, J. A. C., & Egger, M. (2001). Funnel plots for detecting bias in meta-analysis: Guidelines on choice of axis. Journal of Clinical Epidemiology, 54, 1046--1055.
Viechtbauer, W. (2010). Conducting meta-analyses in R with the metafor package. Journal of Statistical Software, 36(3), 1--48. http://www.jstatsoft.org/v36/i03/.