[R] metafor all list elements must be square matrices

[Crean, Hugh]

This may be a very simple fix, but I am struggling to reproduce Becker's (1988) imputation of control group effect sizes for single group trials.  For some reason that I cannot figure out, I am getting an "All list elements in 'V' must be square matrices".  Below is my V matrix, which I believe is square:

Study1

Study2

Study3

Study4

Study5

Study6

Study7

Study8

0.118

0

0

0

0

0.010465

0.010465

0.010465

0

0.121

0

0

0

0.010465

0.010465

0.010465

0

0

0.404

0

0

0.010465

0.010465

0.010465

0

0

0

0.146

0

0.010465

0.010465

0.010465

0

0

0

0

0.09

0.010465

0.010465

0.010465

0.010465

0.010465

0.010465

0.010465

0.010465

0.104465

0.010465

0.010465

0.010465

0.010465

0.010465

0.010465

0.010465

0.010465

0.085465

0.010465

0.010465

0.010465

0.010465

0.010465

0.010465

0.010465

0.010465

0.069465


I get the error running as a multivariate rma.  If I run as a simple rma, I get a non-positive sampling variances error message (but the correlations are all at least between 0 and 1).

Any help is greatly appreciated.

Hugh

Hugh F. Crean, Ph.D.
Assistant Professor of Clinical Nursing
2W.156 Helen Wood Hall
School of Nursing
University of Rochester
601 Elmwood Avenue
Rochester, New York  14620

(585) 276-5575



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