Assert whether a object is a valid contactmatrix object
      Source: R/contactmatrix.R
      assert_contactmatrix.RdThis function asserts that the object x is a valid contactmatrix
object.
Note
Checks:
xinherits from thearrayclassxinherits from thecontactmatrixclassxcontains only numeric valuesxis an hypercube, i.e., number of rows and number of columns are equalxhas asymmetricattribute of classlogical