Percent of points above threshold — metrics

Calculates percentage of points above specified threshold heights and mean height.

Usage

metrics_percabove(z, threshold = c(2, 5), zmin = NA)

.metrics_percabove

Format

An object of class formula of length 2.

Arguments

z: Z coordinate of the point cloud (point heights)
threshold: Numeric. Threshold height(s). Default = c(2, 5).
zmin: numeric. Minimum z value. If set, z values (heights) below are ignored in calculations.

Value

A list. Percent of points above mean and above threshold value(s).

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_percabove(z = Z))

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