RawMoments¶

Inputs¶

• array (vector_real) - the input array

Outputs¶

• rawMoments (vector_real) - the (raw) moments of the input array

Parameters¶

• range (real ∈ (0, ∞), default = 22050) :

  the range of the input array, used for normalizing the results

Description¶

This algorithm computes the first 5 raw moments of an array. The output array is of size 6 because the zero-ith moment is used for padding so that the first moment corresponds to index 1.

Note:

This algorithm has a range parameter, which usually represents a frequency (results will range from 0 to range). For a spectral centroid, the range should be equal to samplerate / 2. For an audio centroid, the frequency range should be equal to (audio_size-1) / samplerate.

An exception is thrown if the input array’s size is smaller than 2.

References:

[1] Raw Moment – from Wolfram MathWorld, http://mathworld.wolfram.com/RawMoment.html

Source code¶

• C++ source code

• C++ header file

See also¶

RawMoments (streaming)