Package: dcurver 0.9.2
Oğuzhan Öğreden
dcurver: Utility Functions for Davidian Curves
A Davidian curve defines a seminonparametric density, whose shape and flexibility can be tuned by easy to estimate parameters. Since a special case of a Davidian curve is the standard normal density, Davidian curves can be used for relaxing normality assumption in statistical applications (Zhang & Davidian, 2001) <doi:10.1111/j.0006-341X.2001.00795.x>. This package provides the density function, the gradient of the loglikelihood and a random generator for Davidian curves.
Authors:
dcurver_0.9.2.tar.gz
dcurver_0.9.2.tar.gz(r-4.5-noble)dcurver_0.9.2.tar.gz(r-4.4-noble)
dcurver_0.9.2.tgz(r-4.4-emscripten)dcurver_0.9.2.tgz(r-4.3-emscripten)
dcurver.pdf |dcurver.html✨
dcurver/json (API)
NEWS
| # Install 'dcurver' in R: |
| install.packages('dcurver', repos = 'https://cloud.r-project.org') |
Bug tracker:https://github.com/oguzhanogreden/dcurver/issues
Last updated 4 years agofrom:d22a184d0c. Checks:1 OK, 2 NOTE. Indexed: no.
| Target | Result | Latest binary |
|---|---|---|
| Doc / Vignettes | OK | Mar 13 2025 |
| R-4.5-linux-x86_64 | NOTE | Mar 13 2025 |
| R-4.4-linux-x86_64 | NOTE | Mar 13 2025 |
Dependencies:RcppRcppArmadillo
Citation
To cite package ‘dcurver’ in publications use:
Öğreden O (2020). dcurver: Utility Functions for Davidian Curves. R package version 0.9.2, https://CRAN.R-project.org/package=dcurver.
ATTENTION: This citation information has been auto-generated from the package DESCRIPTION file and may need manual editing, see ‘help("citation")’.
Corresponding BibTeX entry:
@Manual{,
title = {dcurver: Utility Functions for Davidian Curves},
author = {Oğuzhan Öğreden},
year = {2020},
note = {R package version 0.9.2},
url = {https://CRAN.R-project.org/package=dcurver},
}
Readme and manuals
Davidian curves in R
A Davidian curve defines a seminonparametric density, whose shape and flexibility can be tuned by easy to estimate parameters. Since a special case of a Davidian curve is the standard normal density, Davidian curves can be used for relaxing normality assumption in statistical applications [1].
This package provides the density function, the gradient of the loglikelihood and a random generator for Davidian curves:
-
ddc(x, phi), Davidian curve density function -
rdc(n, phi), a random sampler for Davidian curves -
dc_grad(x, phi), the gradient function of Davidian curves
The second argument phi of these functions is a vector, which contains the parameter(s) of a Davidian curve. The higher the number of parameters, the more flexible the density. The values of the parameres define the shape of the curve. Following [1, 2], this package provides support for Davidian curves up to 10 parameters.
References
- Zhang, D., & Davidian, M. (2001). Linear mixed models with flexible distributions of random effects for longitudinal data. Biometrics, 57(3), 795-802.
- Woods, C. M., & Lin, N. (2009). Item response theory with estimation of the latent density using Davidian curves. Applied Psychological Measurement, 33(2), 102-117.
