certainty(var) )

This function takes as input a variable (of any type) that has been Time Merged. It returns real numbers ranging from 0 to 1, specifying on a row-by-row basis how close each value is to completely extrapolated data (0.) or to original data (1.). If the variable has not been Time Merged, the certainty of every value is 1. The certainty of invalid points has Error status. See also setcert($self,certaintyvar) and the maxCert parameter (see Certainty) to the $TimeMerge transform.