Enveloping spectral surfaces: covariate dependent spectral analysis of categorical time series - Krafty, Robert T.; Xiong, Shuangyan; Stoffer, David S.; Buysse, Daniel J.; Hall, Martica (Journal of time series analysis, 2012)
Keywords: Biology; Circadian Biology; Circadian rhythm; Covariance; Data envelopment analysis; Methodology; optimal scaling; Qualitative analysis; qualitative time series; Sleep disorders; Sleep Medicine; spectral analysis; spectral envelope; Spectrum analysis; Studies; Time series; Spectral Analysis; Optimal Scaling; Circadian Biology; Qualitative Time Series; Sleep Medicine; Spectral Envelope