kernel_density_2d: 2d dernel density estimate.

In hadley/densityvis: Common interface to a range of density calculations.

Description

2d dernel density estimate.

Usage

kernel_density_2d(x, y, weight, xbandwidth="bw.nrd",
    ybandwidth="bw.nrd", na.rm=FALSE)

Arguments

x	a numeric vector of x positions
y	a numeric vector of y positions
weight	NULL or a numeric vector providing weights for each observation
xbandwidth	bandwith for x direction. Either a number or a function to calculate the binwidth from the data.
ybandwidth	bandwith for y direction. Either a number or a function to calculate the binwidth from the data.
na.rm	If TRUE missing values will be silently removed, otherwise they will be removed with a warning.

Details

Only normal kernel/weight function currently implemented. This function is based on kde2d but extended to allow weights, and to compute density at arbitrary position.

Examples

data(baseball, package = "plyr")
dens <- kernel_density_2d(baseball$g, baseball$ab)
plot(dens)

hadley/densityvis documentation built on May 17, 2019, 9:56 a.m.