as_kde {weird}

Convert data frame or matrix object to kde class

Description

A density specified as a data frame or matrix can be converted to a kde object. This is useful for plotting the density using autoplot.kde. As kde objects are defined on a grid, the density values are interpolated based on the points in the data frame or matrix.

Usage

as_kde(object, density_column, ngrid, ...)

Arguments

object

Data frame or matrix with numerical columns, where one column (specified by density_column) contains the density values, and the remaining columns define the points at which the density is evaluated.

density_column

Name of the column containing the density values, specified as a bare expression. If missing, the last column is used.

ngrid

Number of points to use for the grid in each dimension. Default is 10001 for univariate densities and 101 for multivariate densities.

...

Additional arguments are ignored.

Value

An object of class "kde"

Author(s)

Rob J Hyndman

Examples

tibble(y = seq(-4, 4, by = 0.01), density = dnorm(y)) |>
  as_kde()