griddata objects: 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

The following components must be included in a legitimate griddata object.
gridta vector containing the values of the grid on the "x" axis.
gridya 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).
G{Codes 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.}
GindexEach 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.

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.

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

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