VTOTALS VTOTALS(p) or VSUMS(p) gives the total of the non-missing values in each unit of the variates (or scalars) in pointer...

VVARIANCES VVARIANCES(p) gives the variance of the non-missing values in each unit of the variates (or scalars) in pointer p.

WEEKDAY WEEKDAY(x) the day of the week (where Monday is weekday 1) corresponding to data-time value x.

WHERE WHERE(x) produces a variate listing the units of x that are logically true, i.e. non-zero (synonym WHICH). If all the...

WHICH WHICH(x) produces a variate listing the units of x that are logically true, i.e. non-zero (synonym WHERE).