quantities: Handle Measurement Units and Uncertainty on a Numeric Vector

In quantities: Quantity Calculus for R Vectors

Handle Measurement Units and Uncertainty on a Numeric Vector

Description

Set or retrieve measurement units and uncertainty to/from numeric vectors.

Usage

quantities(x)

quantities(x) <- value

set_quantities(x, unit, errors = 0, ...,
  mode = units_options("set_units_mode"))

Arguments

x	a numeric object, or object of class quantities, units or errors.
value	a list of two components: an object of class units or symbolic_units (see units), and a numeric vector of length 1 or the same length as x (see errors).
unit	a units object, or something coercible to one with as_units (see set_units).
errors	a numeric vector of length 1 or the same length as x (see set_errors).
...	passed on to other methods.
mode	if "symbols" (the default), then unit is constructed from the expression supplied. Otherwise, ifmode = "standard", standard evaluation is used for the supplied value This argument can be set via a global option units_options(set_units_mode = "standard")

Details

quantities returns a named list with the units and errors attributes.

`quantities<-` sets the units and error values (and converts x into an object of class quantities). set_quantities is a pipe-friendly version of `quantities<-` and returns an object of class quantities.

See Also

errors, units, groupGeneric.quantities. Extract.quantities, c.quantities, rep.quantities, cbind.quantities. as.data.frame.quantities, as.matrix.quantities, t.quantities.

Examples

x = 1:3
class(x)
x
quantities(x) <- list("m/s", 0.1)
class(x)
x

(x <- set_quantities(x, m/s, seq(0.1, 0.3, 0.1)))

quantities documentation built on Sept. 11, 2024, 7:19 p.m.