Calculate duration of a timeunit in Matlab datenum units.
d = duration(timeunit)
timeunit: String with possible values: - 'mnd' months - 'd' days - 'min' minutes - 'uur' hours - 'cs' centiseconds
d: Duration of the given timeunit in Matlab datenum units.
d = duration('d') d = duration('uur') d = duration('min')
d = 1 d = 0.0417 d = 6.9444e-004