def isValid(self, threshold=1e-7):
"""Rate matrix is valid if rows sum to 0 and no negative off-diags.
threshold gives maximum error allowed in row sums.
"""
if max(abs(sum(self._data, -1)) > threshold):
return False
return not has_neg_off_diags(self._data)
def isValid(self, threshold=1e-7):
"""Rate matrix is valid if rows sum to 0 and no negative off-diags.
threshold gives maximum error allowed in row sums.
"""
if max(abs(sum(self._data, -1)) > threshold):
return False
return not has_neg_off_diags(self._data)
def hasNegOffDiags(self):
"""Returns True if any off-diagonal elements negative."""
return has_neg_off_diags(self._data)
def hasNegOffDiags(self):
"""Returns True if any off-diagonal elements negative."""
return has_neg_off_diags(self._data)
