@cumbnas |

Backward cumulative missing observations of a series.

Increasing samples calculation of the missing (NA) observations in .

Syntax: @cumbnas(x[, s])

x: series

s: (optional) sample string or object

Return: series

Compute the number of missing (NA) values in x from to the end of the workfile or from to the end of the optional sample s.

This function is panel aware.

Examples

series x = @recode(@rnd > 0.5, @nrnd, na)

show x @cumbnas(x)

produces a spreadsheet with two columns correspond to x and @cumbnas(x). The second series (which corresponds to @cumbnas(x)) starts at the count returned by @nas(x) and decrements in those observations where x is NA.

Cross-references

See also
@cumbobs.

For the forward variant of this function, see
@cumnas.