Description Usage Arguments See Also Examples
Returns the DWPT crystals (in a list) corresponding to the basis specified by the indices vector. The indices are mapped as follows:
original series
W(1,0), W(1,1), i.e., all level 1 crystals
W(2,0),...,W(2,3), i.e., all level 2 crystals
and so on. If the indices do not form a basis, an error is issued.
1 | wavPacketBasis(x, indices=0)
|
x |
an object of class |
indices |
an integer vector. Each integer denotes a particular crystal of the DWPT to extract. The set of crystals shoudl form a basis, i.e., the collective frequency ranges associated with the set of crystals should span normalized frequencies [0, 1/2]. The indices for each DWPT level and the corresponding (ideal) normalized frequency ranges are listed in the table below:
and so forth. |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | ## calculate a 3-level DWPT of the sunspots series
W <- wavDWPT(sunspots, n.level=3)
## extract the level 1 basis
W12 <- wavPacketBasis(W, 1:2)
## obtain the names of the crystals that were
## extracted: "w1.0" "w1.1"
names(W12$data)
## extract basis corresponding to crystal set:
## "w2.0" "w2.1" "w1.1". This set comprises a
## split-level basis
Wsplit <- wavPacketBasis(W, c(3,4,2))
names(Wsplit$data)
|
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