Important: The stats package has been deprecated. Use the superseding package Statistics instead.

The function countmissing of the subpackage stats[describe, ...] counts the number of missing observations in data. It uses the weight of the items, as specified by Weight.

The command with(stats[describe],countmissing) allows the use of the abbreviated form of this command.

$\mathrm{with}\left(\mathrm{stats}\right)\:$

$\mathrm{data1}≔\left[\mathrm{Weight}\left(3\,10\right)\,\mathrm{missing}\,4\,\mathrm{Weight}\left(11..12\,3\right)\right]$

$\mathrm{data1}≔\left[\mathrm{Weight}\left(3\,10\right)\,\mathrm{missing}\,4\,\mathrm{Weight}\left(11..12\,3\right)\right]$

$\mathrm{describe}\left[\mathrm{countmissing}\right]\left(\mathrm{data1}\right)$

$1$

$\mathrm{data2}≔\left[\mathrm{Weight}\left(1..10\,3\right)\,\mathrm{Weight}\left(10..20\,4\right)\,\mathrm{Weight}\left(\mathrm{missing}\,5\right)\right]$

$\mathrm{data2}≔\left[\mathrm{Weight}\left(1..10\,3\right)\,\mathrm{Weight}\left(10..20\,4\right)\,\mathrm{Weight}\left(\mathrm{missing}\,5\right)\right]$

$\mathrm{Nmiss}≔\mathrm{describe}\left[\mathrm{countmissing}\right]\left(\mathrm{data2}\right)$

$\mathrm{Nmiss}≔5$

$\frac{\mathrm{Nmiss}}{\mathrm{describe}\left[\mathrm{count}\right]\left(\mathrm{data2}\right)+\mathrm{Nmiss}}$

$\frac{5}{12}$