signalwidth.m

Finds the signal widhth of vector or matrix of data

Estimates the signal width of data input, using definition:

rho = cumtrapz(t,x.^2)/trapz(t,x.^2)

The integration limits go from mean(t)-w/2 and mean(t)+w/2; w is defined as the signal width, and gives the time at which rho % of the signal is
captured. It is an informal measure of the localization of a signal.
Rho, in most applications, is ~90%.