hw_H: KDE bandwidth for residual variability in height/weight
In httk: High-Throughput Toxicokinetics
hw_H R Documentation
KDE bandwidth for residual variability in height/weight
Description
Bandwidths used for a two-dimensional kernel density estimation of the joint
distribution of residual errors around smoothing spline fits of height vs. age
and weight vs. age for NHANES respondents in each of ten combinations of sex
and race/ethnicity categories.
Usage
hw_H
Format
A named list with 10 elements, each a matrix with 2 rows and 2
columns. Each list element corresponds to, and is named for, one combination
of NHANES sex categories (Male and Female) and NHANES race/ethnicity
categories (Mexican American, Other Hispanic, Non-Hispanic White,
Non-Hispanic Black, and Other).
Details
Each matrix is a variance-covariance matrix for a two-dimensional normal
distribution: this is the bandwidth to be used for a two-dimensional kernel
density estimation (KDE) (using a two-dimensional normal kernel) of the joint
distribution of residual errors around smoothing spline fits of height vs. age
and weight vs. age for NHANES respondents in the specified sex and
race/ethnicity category. Optimal bandwidths were pre-calculated by doing the
smoothing spline fits, getting the residuals, then calling
kde on the residuals (which calls Hpi to
compute the plug-in bandwidth).
Used by HTTK-Pop only in "virtual individuals" mode (i.e.
httkpop_generate with method = "v"), in
gen_height_weight.
Author(s)
Caroline Ring
References
Ring, Caroline L., et al. "Identifying populations sensitive to
environmental chemicals by simulating toxicokinetic variability."
Environment International 106 (2017): 105-118
httk documentation built on March 7, 2023, 7:26 p.m.
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| hw_H | R Documentation |
KDE bandwidth for residual variability in height/weight
Description
Bandwidths used for a two-dimensional kernel density estimation of the joint distribution of residual errors around smoothing spline fits of height vs. age and weight vs. age for NHANES respondents in each of ten combinations of sex and race/ethnicity categories.
Usage
hw_H
Format
A named list with 10 elements, each a matrix with 2 rows and 2 columns. Each list element corresponds to, and is named for, one combination of NHANES sex categories (Male and Female) and NHANES race/ethnicity categories (Mexican American, Other Hispanic, Non-Hispanic White, Non-Hispanic Black, and Other).
Details
Each matrix is a variance-covariance matrix for a two-dimensional normal
distribution: this is the bandwidth to be used for a two-dimensional kernel
density estimation (KDE) (using a two-dimensional normal kernel) of the joint
distribution of residual errors around smoothing spline fits of height vs. age
and weight vs. age for NHANES respondents in the specified sex and
race/ethnicity category. Optimal bandwidths were pre-calculated by doing the
smoothing spline fits, getting the residuals, then calling
kde on the residuals (which calls Hpi to
compute the plug-in bandwidth).
Used by HTTK-Pop only in "virtual individuals" mode (i.e.
httkpop_generate with method = "v"), in
gen_height_weight.
Author(s)
Caroline Ring
References
Ring, Caroline L., et al. "Identifying populations sensitive to environmental chemicals by simulating toxicokinetic variability." Environment International 106 (2017): 105-118
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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