integer controlling behaviour at start and end of x. If
rule=1, NA values at the ends are left in the return value.
If rule=2, they are replaced with the nearest non-NA point.
Value
A new oc object, with gaps removed.
Bugs
{Eventually, this will be expanded to work with any
oce object. But, for now, it only works for vectors that can
be coerced to numeric.}
{If the first or last point is NA, then x
is returned unaltered.}
{Only method linear works now, and that argument is
ignored at present.}
Details
Sequences of NA values, are filled by linear
interpolation between the non-NA values that bound the gap.