metrics_Lmoments: L-moments and L-moment ratios

In ptompalski/lidRmetrics: Point cloud metrics for the lidR package.

L-moments and L-moment ratios

Description

Calculates L-moments and L-moment ratios of point cloud heihts.

Usage

metrics_Lmoments(z, zmin = NA)

.metrics_Lmoments

Arguments

z	Z coordinate of the point cloud (point heights)
zmin	numeric. Minimum z value. If set, z values (heights) below are ignored in calculations.

Format

An object of class formula of length 2.

Value

A list. L-moments and L-moment ratios

• L-moments: L1, L2, L3, L4

• L-moment ratios: Lskew (L3/L2), Lkurt (L4/L2), and Lcoefvar (L2/L1)

Examples

library(lidR)
library(lidRmetrics)
LASfile <- system.file("extdata", "Megaplot.laz", package="lidR")
las <- readLAS(LASfile, select = "*", filter = "-keep_random_fraction 0.5")

m1 <- cloud_metrics(las, ~metrics_Lmoments(z = Z))

m2 <- pixel_metrics(las, ~metrics_Lmoments(z = Z, zmin = 2), res = 20)

ptompalski/lidRmetrics documentation built on June 1, 2025, 1:08 p.m.