The leading minor of order 2 is not positive definite

[Wala Draidi Areed]

Hi nimble user,

 I have encountered an error in the code, which I have attached. Despite initialising all the parameters, the error still persists. I was wondering if you had any suggestions on how to resolve this issue.

Thank you,
Wala

error in chol.default(model$Tau[getNodeFunctionIndexedInfo(INDEXEDNODEINFO_,  :
  the leading minor of order 2 is not positive definite
Error in chol.default(model$Tau[getNodeFunctionIndexedInfo(INDEXEDNODEINFO_,  :
  the leading minor of order 2 is not positive definite
  [Note] Cannot calculate logProb for node lifted_chol_oPTau_oBm_comma_1to6_comma_1to6_cB_cP_L8[1, 1:6, 1:6].

[Chris Paciorek]

Hi Wala,

It looks like you are initializing the matrices in a way that they are not positive definite by setting all the entries to be the same. 

> chol(Tau[1,,])
Error in chol.default(Tau[1, , ]) :

  the leading minor of order 2 is not positive definite

You need to make sure that each of the 6x6 matrices is positive definite, and thereby a valid precision matrix. E.g., you could initialize each as a diagonal matrix.

-Chris

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[Wala Draidi Areed]

Hi Chris,
Thanks for your help. It's working now.
Wala