Number of missing observations.
Number of missing (NA) observations
in 
.Syntax: @nas(x[, s])
x: data object
s: (optional) sample string or object when x is a series or alpha and assigning result to a series
Return: number
For series calculations, EViews will use the current or specified workfile sample.
Examples
If x is a series of length 5 with elements 1, NA, 2, NA, 3, then
= @nas(x)
returns 2.
Cross-references