# ext

From Rwave v2.4-8
by Jonathan Lees

##### Extrema of Dyadic Wavelet Transform

Compute the local extrema of the dyadic wavelet transform modulus.

- Keywords
- ts

##### Usage

`ext(wt, scale=FALSE, plot=TRUE)`

##### Arguments

- wt
dyadic wavelet transform.

- scale
flag indicating if the extrema at each resolution will be plotted at the same scale.

- plot
if set to TRUE, displays the transform on the graphics device.

##### Value

Structure containing:

original signal.

extrema representation.

coarse resolution of signal.

number of decomposition scales.

size of signal.

##### References

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

##### See Also

*Documentation reproduced from package Rwave, version 2.4-8, License: GPL (>= 2)*

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