mexhat

Purpose

Mexican hat wavelet in time domain.

Synopsis

h = mexhat
h = mexhat(nu)

Description

mexhat returns the mexican hat wavelet, with central frequency nu (nu is a normalized frequency). Its expression writes

$$h(t)=\nu\ \frac{\sqrt{\pi}}{2}\ (1-2(\pi\nu t)^2)\ \exp[-(\pi\nu\ t)^2].$$

Name	Description	Default value
nu	any real between 0 and 0.5	0.05
h	time vector containing the mexhat samples
	length(h)=2*ceil(1.5/nu)+1

Example

         plot(mexhat);

See Also

klauder.

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