Description Usage Arguments Details Value Author(s) References See Also Examples

Aligns both wavelet (high pass) and scaling (low pass) coefficients of
objects of class `dwt`

, `modwt`

, `dwpt`

, and
`modwpt`

using phase shift values computed by
`wt.filter.shift`

.

1 |

`wt` |
An object of class |

`coe` |
Logical value indicating whether to use center of energy method in computing phase shifts. |

`inverse` |
Logical value indicating whether to shift wavelet and scaling coefficients of an aligned object back to their original positions. |

An object of class `dwt`

, `modwt`

, is characterized as
'unaligned' if the value in the `aligned`

slot is `FALSE`

.
Similarly, these objects are classified as 'aligned' if the value in
the `aligned`

slot is `TRUE`

. Thus, `align`

will only
operate on an 'unaligned' wavelet transform object if ```
inverse =
FALSE
```

and on an 'aligned' wavelet transform object if ```
inverse
= TRUE
```

.

The argument `coe`

is passed to the `wt.filter.shift`

function to determine what method to use for computing phase shifts
(see documentation for `wt.filter.shift`

).

Either an aligned or unaligned object of the same class as `wt`

(see Details above).

Eric Aldrich. ealdrich@gmail.com.

Percival, D. B. and A. T. Walden (2000) *Wavelet Methods for Time
Series Analysis*, Cambridge University Press.

1 2 3 4 5 6 7 8 9 10 | ```
# obtain the two series listed in Percival and Walden (2000), page 42
X1 <- c(.2,-.4,-.6,-.5,-.8,-.4,-.9,0,-.2,.1,-.1,.1,.7,.9,0,.3)
X2 <- c(.2,-.4,-.6,-.5,-.8,-.4,-.9,0,-.2,.1,-.1,.1,-.7,.9,0,.3)
# combine them and compute DWT
newX <- cbind(X1,X2)
wt <- dwt(newX, n.levels=3, boundary="reflection", fast=FALSE)
# align
wt.aligned <- align(wt)
``` |

wavelets documentation built on May 20, 2017, 12:19 a.m.

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