Method Reference: calendarDuration.isnan

calendarDuration: TF = isnan (calD)

Return true for calendar durations that are Not-A-Number.

TF = isnan (calD) returns a logical array TF of the same size as calD containing true for each corresponding element of calD that is NaN and false otherwise.

Source Code: calendarDuration

Example: 1

isnan flags the elements built from a NaN component — a Not-a-Number span.

 d = calmonths ([1, NaN, 3])
d =
  1x3 calendarDuration array

    1mo    NaN    3mo
 isnan (d)
ans =

  0  1  0