Programmer Guide/Command Reference/EVAL/zcross: Difference between revisions
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;Result: The function counts the number of zero crossings ''nz'' of the function <code>''x''[i] = f(i)</code>. The returned result is a scalar depending on ''nz'' and the argument ''type''. | ;Result: The function counts the number of zero crossings ''nz'' of the function <code>''x''[i] = f(i)</code>. The returned result is a scalar depending on ''nz'' and the argument ''type''. | ||
:{|class="einrahmen" | :{|class="einrahmen" | ||
!''type'' !! | !''type'' !! result | ||
|- | |- | ||
|'''0''' || the number of zero crossing ''nz'' | |'''0''' || the number of zero crossing ''nz'' | ||
Revision as of 10:55, 11 April 2011
Compute zero crossing density.
- Usage
qinterp(x {type, {, sr}})- x
- data vector (signal)
- type
- selects the type of result; 0 <= type <= 3 (default=0)
- sr
- sampling rate in Hz (default=1)
- Result
- The function counts the number of zero crossings nz of the function
x[i] = f(i). The returned result is a scalar depending on nz and the argument type.
type result 0 the number of zero crossing nz 1 the zero crossing density dz = nz / ( ncol(x) * sr)
(number of zero crossings / second)2 the average zero crossing frequenzy (in Hz) f = dz / 2 3 the average zero crossing periode length (in seconds) t = 2 / dz
- See also
- f0ac
