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We have a function called "verifyCovarianceMatrix" in the front-end that does some sanity checking on covariance matrices. What types of error checking are needed for correlation matrices? This assignment is for Ross, because we weren't using our bug report interface. "verifyCovarianceMatrix" does the following:
- matrix is square?
- matrix has NA values?
- matrix is symmetric?
- matrix is positive-definite?