This function returns a character string according to a particular format for naming D2ACW objects.
Usage
Psi2Dname(J, filter.number, family, switch)
Value
A character string containing the name of an object according to a particular naming scheme.
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), ...
Author
Idris Eckley
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.
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/.
## 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"