added eigMatrix <- logical() to initialize method of exprClass
added eigMatrix <- logical() to initialize method of exprClass

NLMichaud/nimble,NLMichaud/nimble,nxdao2000/nimble,nimble-dev/nimble,NLMichaud/nimble,nxdao2000/nimble,nimble-dev/nimble,NLMichaud/nimble,nimble-dev/nimble,nxdao2000/nimble,nimble-dev/nimble,nimble-dev/nimble,nxdao2000/nimble