quantities (version 0.2.2)

Extract.quantities: Extract or Replace Parts of an Object

Description

S3 operators to extract or replace parts of quantities objects.

Usage

# S3 method for quantities
[(x, ...)
# S3 method for quantities
[[(x, ...)
# S3 method for quantities
[(x, ...) <- value
# S3 method for quantities
[[(x, ...) <- value

Arguments

x

object from which to extract element(s) or in which to replace element(s).

...

additional arguments to be passed to base methods (see Extract).

value

typically an array-like R object of a similar class as x.

Examples

x <- set_quantities(1:3, m/s, 0.1)
y <- set_quantities(4:6, m/s, 0.2)
(z <- rbind(x, y))
z[2, 2]
z[2, 2] <- -1
errors(z[[1, 2]]) <- 0.8 # assumes same unit
errors(z[[2, 2]]) <- set_units(80, cm/s)
z[, 2]