engel

<p>The Engel food expenditure data from the R package <code>quantreg</code>.</p>

datasets

Quantile-frequency analysis (QFA) of time series based on trigonometric quantile regression.
Spline quantile regression (SQR) for regression coefficient estimation.
References:
[1] Li, T.-H. (2012) "Quantile periodograms," Journal of the American Statistical
Association, 107, 765–776, <doi:10.1080/01621459.2012.682815>.
[2] Li, T.-H. (2014) Time Series with Mixed Spectra, CRC Press, <doi:10.1201/b15154>
[3] Li, T.-H. (2022) "Quantile Fourier transform, quantile series, and nonparametric
estimation of quantile spectra," <doi:10.48550/arXiv.2211.05844>.
[4] Li, T.-H. (2024) "Quantile crossing spectrum and spline autoregression
estimation," <doi:10.48550/arXiv.2412.02513>.
[5] Li, T.-H. (2024) "Spline autoregression method for estimation of quantile spectrum,"
<doi:10.48550/arXiv.2412.17163>.
[6] Li, T.-H., and Megiddo, N. (2025) "Spline quantile regression,"
<doi:10.48550/arXiv.2501.03883>.

Ta-Hsin Li

Quantile-Frequency Analysis (QFA) of Time Series

engel function

<p>An object of class <code>data.frame</code> with 235 rows and 2 columns.</p>

engel: Engel food expenditure data

Description

Usage

Arguments

Format

References