tmerge(valueVar-self,dtVar,method,interval,maxTimeGap, handleDuplicates, handleOutOfOrder,maxCert)

This transform is like $TimeMerge. It takes as input a variable that has numeric or string values and a date/time variable, and merges the value variable to match the date/time variable. Unlike the system-generated $TimeMerge, it does not delete the value variable's original date/time column. The additional arguments are the same as for $timemerge. The output variable must be the same as the input value variable.