Hi Mike and other users,
I have a question concerning the the function asycov in the preparatory process for a Meta-Analysis using SEM and the WLS-Function. I have a manually created pooled correlation matrix (6x6) as there are some correlations I didn’t compute by myself. The problem is, that there are 4 missing values which resulted in the following error term when trying to calculate the covariance matrix with the asycov function:
if (!is.pd(x.new)) stop("x is not positive definite!\n"). I tried another smaller correlation matrix with missing values and it worked. Do you know why it does not work in the other case and how I could solve this problem?
I really appreciate your help on that.
Greta