gbker2d1

Usage

Overview

2D kernel density estimation on an equispaced grid. Data are read from standard input as couple (x,y). The kernel bandwidth if not provided with the option -H is set automatically. Different bandwidths can be specified for x and y.

Options

-n

number of points where the density is computed (default 10) use comma (,) to specify different values for x and y components

-H

set the kernel bandwidth explicitly; use comma (,) to specify different values for x and y components

-S

scale the kernel bandwidth with respect to euristic 'optimal' value; use comma (,) to specify different values for x and y components

-K

choose the kernel to use: 0: Epanenchnikov 1: Rectangular 2: Silverman type 1 3: Silverman type 2 (default 0)

-D

switch off data de-variation procedure

-v

verbose mode

-F

specify the input fields separators (default " \t")

-h

this help

Examples

gbker2d -n 10,20 -K 1 < file

compute the kernel on an equispaced grid 10x20 using a rectangular kernel