Append a vector to an lvec
append(x, y, ...)# S3 method for lvec
append(x, y, clone = TRUE, ...)
# S3 method for ldat
append(x, y, clone = TRUE, ...)
lvec to append to.
ignored; used to pass additional arguments to other methods.
should x be cloned first. If not, the input x is
modified.
Returns an lvec combining both x and y. When x is
NULL a clone of y is returned.