Level Crossing Rate

The function calculates Level Crossing Rate (LCR).

LCR calculates Level Crossing Rate, that is a number of crossings (in the positive direction) of an input vector through a given threshold vector.
[x,t] = lcr( sig, thr );

The crossings are calculated for all the values of the input threshold vector. The input signal has to be a vector.

Example:
n = randn( 1, 1000 );
x = lcr( n, -5:0.1:5 );
plot( t, x );