The generic as.ore
function coerces in-memory R objects to ore
objects. The more specific functions, such as as.ore.character
, coerce objects to specific types. The ore.push
function implicitly coerces R class types to ore
class types and the ore.pull
function coerces ore
class types to R class types. For information on those functions, see "Moving Data to and from the Database".
Example 1-5 Coercing R and Oracle R Enterprise Class Types
This example illustrates coercing R objects to ore
objects. creates an R integer
object and then uses the generic method as.ore
to coerce it to an ore
object, which is an ore.integer
. The example coerces the R object to various other ore
class types. For an example of using as.factor
in embedded R execution function, see Example 6-13.
x <- 1:10 class(x) X <- as.ore(x) class(X) Xn <- as.ore.numeric(x) class(Xn) Xc <- as.ore.character(x) class(Xc) Xc Xf <- as.ore.factor(x) XfListing for Example 1-5
R> x <- 1:10 R> class(x) [1] "integer" R> X <- as.ore(x) R> class(X) [1] "ore.integer" attr(,"package") [1] "OREbase" R> Xn <- as.ore.numeric(x) R> class(Xn) [1] "ore.numeric" attr(,"package") [1] "OREbase" R> Xc <- as.ore.character(x) R> class(Xc) [1] "ore.character" attr(,"package") [1] "OREbase" R> Xc [1] "1" "2" "3" "4" "5" "6" "7" "8" "9" "10" R> Xf <- as.ore.factor(x) R> Xf [1] 1 2 3 4 5 6 7 8 9 10 Levels: 1 10 2 3 4 5 6 7 8 9