pdl: Polynomial distributed lags
Description
Returns a regressor matrix for polynomial distributed
lags.
Usage
pdl(x, d = 2, q = 3, trim = FALSE)
Arguments
- x
a numeric vector.
- d
an integer specifying the order of the polynomial.
- q
an integer specifying the number of lags to use in
creating polynomial distributed lags. This must be
greater than d.
- trim
a logical flag; if TRUE, the missing values at
the beginning of the returned matrix will be trimmed.