Lagged Differences

S3 method for quantities objects (see diff).

Usage

# S3 method for class 'quantities'
diff(x, lag = 1L, differences = 1L, ...)

Arguments

x

a numeric vector or matrix containing the values to be differenced.

lag

an integer indicating which lag to use.

differences

an integer indicating the order of the difference.

...

further arguments to be passed to or from methods.

Examples

diff(set_quantities(1:10, m/s, 0.1), 2)
#> Units: [m/s]
#> Errors: 0.1414214 0.1414214 0.1414214 0.1414214 0.1414214 ...
#> [1] 2 2 2 2 2 2 2 2
diff(set_quantities(1:10, m/s, 0.1), 2, 2)
#> Units: [m/s]
#> Errors: 0.2 0.2 0.2 0.2 0.2 ...
#> [1] 0 0 0 0 0 0
x <- cumsum(cumsum(set_quantities(1:10, m/s, 0.1)))
diff(x, lag = 2)
#> Units: [m/s]
#> Errors: 0.2645751 0.3605551 0.4582576 0.5567764 0.6557439 ...
#> [1]   9  16  25  36  49  64  81 100
diff(x, differences = 2)
#> Units: [m/s]
#> Errors: 0.3605551 0.5000000 0.6403124 0.7810250 0.9219544 ...
#> [1]  3  4  5  6  7  8  9 10