While trying to use several functions (e.g.  assetsMeanCov(x,
method="cov") ) from fPortfolio package, I get error messages stating
that it is  "unable to find function isPositiveDefinite". I checked and
apparently all required packages (dependencies) were installed and
loaded. Looking at the documentations available I was unable to find any
reference to this function. Has anyone get this problem before? How to
solve it?

Tks


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