[R] MAc-package, on OS-X 10.11.1: Warning Message In sqrt(var.T.agg.tau) : NaNs produced

[Roebuck,Paul L]

Maybe change the warnings to errors temporarily, and decide for yourself about the problem.

...
R> options(warn=2)        # Turn warnings into errors
R> omni(es=z, var=var.z, data=dat, type="weighted", method="fixed", ztor=TRUE)
R> traceback()


________________________________________
From: R-help [r-help-bounces at r-project.org] on behalf of Kostadin Kushlev [kushlevk at gmail.com]
Sent: Tuesday, November 10, 2015 2:14 AM
To: r-help at r-project.org
Subject: [R] MAc-pakcage,       on OS-X 10.11.1: Warning Message In sqrt(var.T.agg.tau) : NaNs  produced

I am trying to run a mini meta-analysis for three studies within one of my papers. I am using the Mac package for meta-analyzing correlation coefficients.

I am using the following command: omni(es = z, var = var.z, data = dat, type="weighted", method = "fixed", ztor = TRUE)

This produces the expected values, but also a warning message: In sqrt(var.T.agg.tau) : NaNs produced

This message is repeated twice.

I am wondering how to interpret this error message. Is this because the program can’t estimate certain parameters due to the small number of correlation coefficients I am trying to analyze (only 3)?

Most importantly, can I report and interpret the output despite those messages?
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