Euclidean distance between consecutive points

Compute the Euclidean distance between each consecutive pair of rows in a matrix — typically a trajectory through PC space.

Usage

do_euclid(x)

Arguments

x

Numeric matrix [n_points × n_dims].

Value

Numeric vector of length nrow(x). The first element is always 0 (no previous point).

Examples

set.seed(1)
pcs <- matrix(rnorm(50 * 3), nrow = 50, ncol = 3)
d <- do_euclid(pcs)
length(d)  # 50
#> [1] 50