Calculate the sparseness of a vector.

Sparseness can be calculated as lifetime kurtosis (LTK, Willmore and Tolhurst, 2001) or as lifetime sparseness (LTS, Bhandawat et al., 2007).

Usage

sparse(x, method = "ltk")

Arguments

x

numerical input vector

method

type of sparseness measure, either 'ltk' for lifetime kurtosis or 'lts' for lifetime sparseness (see references).

Details

LTS scales between \[0,1\] while LTK is not restricted. LTS only takes positive values.

References

Bhandawat, V., Olsen, S.R., Gouwens, N.W., Schlief, M.L., Wilson, R.I., 2007. Sensory processing in the Drosophila antennal lobe increases reliability and separability of ensemble odor representations. Nature neuroscience 10, 1474–82. doi:10.1038/nn1976

Willmore, B., Tolhurst, D.J., 2001. Characterizing the sparseness of neural codes. Network 12, 255–270. doi:10.1080/net.12.3.255.270

Author

Daniel Münch <daniel.muench@uni-konstanz.de>