@cumbobs |

Backward cumulative observations of a series.

Increasing samples calculation of the number of non-missing observations in .

Syntax: @cumbobs(x[, s])

x: series

s: (optional) sample string or object

Return: series

Compute the number of non-missing 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 @cumbobs(x)

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

Cross-references

See also
@cumbnas.

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