impose internal coherence (positive definite) on a matrix

[shredder11]

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?

 

[spunky]

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?

 

[hlsmith]

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