impose internal coherence (positive definite) on a matrix

how do I turn a matrix which bears the resemblance of a variance covariance matrix into a "positive definite" matrix (=a usable var cov matrix) ?

is there any way?


Can't make spagetti
is there any particular reason as for why you're not using an actual positive definite matrix? or an actual covariance matrix that satisfies this and other properties?


Less is more. Stay pure. Stay poor.
Because their name is shredder11 they can do what they want. Watch your mouth spunky and answer the question, NOW.