calendarDuration.isfinite
calendarDuration: TF = isfinite (calD)
Return true for calendar durations that are finite.
TF = isfinite (calD) returns a logical array TF
of the same size as calD containing true for each
corresponding element of calD that is finite and false
otherwise. Finite elements are those which are neither infinite nor
Not-A-Number.
Source Code: calendarDuration