R: Reconstruction from a Ridge

regrec2 {Rwave} | R Documentation

## Reconstruction from a Ridge

### Description

Reconstructs signal from a “regularly sampled” ridge, in the wavelet case, from a precomputed kernel.

### Usage

    regrec2(siginput, cwtinput, phi, nbnodes, noct, nvoice, Q2,
    epsilon=0.5, w0=2 * pi, plot=FALSE)

### Arguments

`siginput` | input signal.
`cwtinput` | wavelet transform, output of `cwt`.
`phi` | unsampled ridge.
`nbnodes` | number of samples on the ridge
`noct` | number of octaves (powers of 2)
`nvoice` | number of different scales per octave
`Q2` | second term of the reconstruction kernel
`epsilon` | coefficient of the Q_2 term in reconstruction kernel
`w0` | central frequency of Morlet wavelet
`plot` | if set to TRUE, displays original and reconstructed signals

### Details

The computation of the kernel may be time consuming. This function avoids recomputing it if it was computed already.

### Value

Returns a list containing:

`sol` | reconstruction from a ridge.
`A` | <wavelets,dualwavelets> matrix.
`lam` | coefficients of dual wavelets in reconstructed signal.
`dualwave` | array containing the dual wavelets.
`morvelets` | array containing the wavelets on sampled ridge.
`solskel` | wavelet transform of sol, restricted to the ridge.
`inputskel` | wavelet transform of signal, restricted to the ridge.
`nbnodes` | number of nodes used for the reconstruction.

### References

See discussions in the text of “Practical Time-Frequency Analysis”.

### See Also

`regrec`, `gregrec`, `ridrec`, `sridrec`.

[Package Rwave version 2.6-0 Index]