griddata objects {wavethresh}

Data interpolated to a grid objects.

Description

These are objects of classes

griddata

These objects store the results of interpolating a 1-D regression data set to a grid which is a power of two in length

Details

The help page for makegrid and Kovac, (1997), p.81 give further details about how a griddata object is constructed.

Value

The following components must be included in a legitimate griddata object.

gridt

a vector containing the values of the grid on the "x" axis.

gridy

a vector containing the values of the grid on the "y" axis. This vector has to be the same length as gridt. Typically the values in (gridt, gridy) are the results of interpolating arbitrary data (x,y) onto (gridt, gridy).

GCodes the value of the linear interpolant matrix for the corresponding entry in gridt. The value at each point corresponds to the proportion of the original data point pointed to by Gindex that contributes to the new value at the corresponding gridt value. See Kovac, (1997), page 81 for further information.

Gindex

Each entry in Gindex refers to one of the pairs in (x,y) which is contributing to the (gridt, gridy) interpolant. See previous help for G.

GENERATION

This class of objects is returned from the makegrid function to represent the results of interpolating a 1-D regression data set to a grid.

METHODS

The griddata class of objects really on has one function that uses it: irregwd.

RELEASE

Version 3.9.6 Copyright Arne Kovac 1997 Copyright Guy Nason (help pages) 1999.

SEE ALSO

makegrid, irregwd

Author(s)

Arne Kovac