R: Scale factor for density kernel

kernel.factor {spatstat} | R Documentation

## Scale factor for density kernel

### Description

Returns a scale factor for the kernels used in density estimation for numerical data.

### Usage

      kernel.factor(kernel = "gaussian")

### Arguments

`kernel` | String name of the kernel. Options are `"gaussian"`, `"rectangular"`, `"triangular"`, `"epanechnikov"`, `"biweight"`, `"cosine"` and `"optcosine"`. (Partial matching is used).

### Details

Kernel estimation of a probability density in one dimension is performed by `density.default` using a kernel function selected from the list above.

This function computes a scale constant for the kernel. For the Gaussian kernel, this constant is equal to 1. Otherwise, the constant c is such that the kernel with standard deviation 1 is supported on the interval [-c,c].

For more information about these kernels, see `density.default`.

### Value

A single number.

### Author(s)

Adrian Baddeley Adrian.Baddeley@curtin.edu.au and Martin Hazelton

### See Also

`density.default`, `dkernel`, `kernel.moment`, `kernel.squint`

### Examples

       kernel.factor("rect")
       # bandwidth for Epanechnikov kernel with half-width h=1
       h <- 1
       bw <- h/kernel.factor("epa")

[Package spatstat version 1.54-0 Index]