Bracket slice and assignment methods adapted for random vectors and arrays.
The assignment function impute<- is compatible with both non-rv and
rv objects (rv, rvsummary, and rvfactor objects). To write universal code
that works both atomic and rv objects, use impute(x, ...) <- value
instead of x[...] <- value.
NOTE. x will NOT be automatically coerced into an rv object.
value may be an rv object or a regular numeric object.
Extracting rv objects works the same way as extracting components of a numerical vector or array. The return value is always an object of class 'rv'. Type ?Extract for details.
Note: the index arguments (i, j, etc.) must be
constants, but this may change in the future.
%Note: the index arguments (i, j, etc.) may be %themselves
random variables, however they will be coerced %into integers, as one
would expect.
object from which to extract element(s) or in which to replace element(s).
indices specifying elements to extract or replace.
typically an array-like R object of a similar class as
x.
For matrices and arrays. If TRUE the result is coerced
to the lowest possible dimension (see the examples). This only works for
extracting elements, not for the replacement.
A random variable (an rv object).
Kerman, J. and Gelman, A. (2007). Manipulating and Summarizing Posterior Simulations Using Random Variable Objects. Statistics and Computing 17:3, 235-244.
See also vignette("rv").
x <- rvnorm(1)
y <- (1:5)
if (FALSE) {
y[2] <- x ## Will not work
}
impute(y, 2) <- x