Handle Correlations Between quantities Objects

Methods to set or retrieve correlations or covariances between quantities objects.

Usage

# S3 method for class 'quantities'
correl(x, y) <- value

# S3 method for class 'quantities'
covar(x, y) <- value

Arguments

x

an object of class quantities.

y

an object of class quantities of the same length as x.

value

a compatible object of class units of length 1 or the same length as x. For correlations, this means a unitless vector (a numeric vector is also accepted in this case). For covariances, this means the same magnitude as x*y.

See also

correl.

Examples

x <- set_quantities(1:10, m/s, 0.1)
y <- set_quantities(10:1, km/h, 0.2)
correl(x, y) <- 0.1 # accepted
correl(x, y) <- set_units(0.1) # recommended
correl(x, y)
#> Units: [1]
#>  [1] 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
covar(x, y)
#> Units: [km*m/h/s]
#>  [1] 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002