nndensity.pp3: Extension of 'nndensity' to handle pp3 objects.
In aproudian2/rapt: Atom Probe Tomography Analysis

nndensity.pp3

R Documentation

Extension of `nndensity` to handle pp3 objects.

Description

Calculates the 3D nearest-neighbor intensity estimate of a point process at either a grid of points or at the point locations in the data set. Utilizes the volume weighted edge correction. See Statistics for Spatial Data by Cressie pg. 654 for more info.

Usage

## S3 method for class 'pp3'
nndensity(X, k, nx, ny, nz, dz, at.points = FALSE, par = TRUE, cores = 7)

Arguments

`X`	The point pattern to estimate the intensity of.
`k`	Vector containing the nearest-neighbor #s that the estimate should be calculated for.
`nx, ny, nz`	If estimating on a grid, the number of grid points in x, y, and z.
`dz`	The z spacing for numeric integration for the edge correction (suggested ~ 0.1-0.5)
`at.points`	`TRUE` or `FALSE`. Whether or not to estimate intensity at points in pattern. If `TRUE`, nx, ny, and nz are not used.
`par`	`TRUE` or `FALSE`: whether or not to calculate in parallel
`cores`	If `par = TRUE`, this is the number of cores to use for the parallel calculation.

Value

List containing: [1] A data frame of the intensity estimates for each nearest neighbor value. [2] The coordinates of the estimates. [3] The coordinates of the original points from the data set.

aproudian2/rapt documentation built on Dec. 15, 2022, 4:24 a.m.