Psi2Dname {LS2W}

Return a D2ACW list object style name.

Description

This function returns a character string according to a particular format for naming D2ACW objects.

Usage

Psi2Dname(J, filter.number, family, switch)

Arguments

J

A negative integer representing the order of the D2ACW object.

filter.number

The index number of the wavelet used to build the D2ACW object.

family

The wavelet family used to build the D2ACW object.

switch

Can take the values direction or level - enabling control of whether the returned value is structured by scales within a given direction (-1, D), (-2, D), (-3, D), ... or by direction within scales (-1, H), (-1, V), (-1, D), (-2, H), ...

Details

Some of the objects computed by D2ACW take a long time to compute. Hence it is a good idea to store them and reuse them. This function generates a name according to a particular naming scheme that permits a search algorithm to easily find the matrices.

Each object has three defining characteristics: its order, filter.number and family. Each of these three characteristics are concatenated together to form a name.

This function performs exactly the same role as rmname except for objects produced by D2ACW.

Value

A character string containing the name of an object according to a particular naming scheme.

Author(s)

Idris Eckley

References

Eckley, I.A. and Nason, G.P. (2005). Efficient computation of the inner-product matrix of discrete autocorrelation wavelets. Statistics and Computing, 15, 83-92.

Eckley, I.A. and Nason, G.P. (2011). LS2W: Implementing the Locally Stationary 2D Wavelet Process Approach in R, Journal of Statistical Software, 43(3), 1-23. URL http://www.jstatsoft.org/v43/i03/.

See Also

D2ACW,Psi1Dname

Examples

#
# What's the name of the order 4 Haar PsiJ object?
#
 Psi2Dname(-4, filter.number=1, family="DaubExPhase", switch="direction")
#[1] "D1Psi.d.4.1.DaubExPhase"