simsl v0.2.1


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Single-Index Models with a Surface-Link

An implementation of a single-index regression for optimizing individualized dose rules from an observational study. To model interaction effects between baseline covariates and a treatment variable defined on a continuum, we employ two-dimensional penalized spline regression on an index-treatment domain, where the index is defined as a linear combination of the covariates (a single-index). An unspecified main effect for the covariates is allowed, which can also be modeled through a parametric model. A unique contribution of this work is in the parsimonious single-index parametrization specifically defined for the interaction effect term. We refer to Park, Petkova, Tarpey, and Ogden (2020) <doi:10.1111/biom.13320> (for the case of a discrete treatment) and Park, Petkova, Tarpey, and Ogden (2021) "A single-index model with a surface-link for optimizing individualized dose rules" <arXiv:2006.00267v2> for detail of the method. The model can take a member of the exponential family as a response variable and can also take an ordinal categorical response. The main function of this package is simsl().

Functions in simsl

Name Description A subfunction used in estimation
warfarin Warfarin dataset
simsl Single-index models with a surface-link (main function)
pred.simsl SIMSL prediction function
fit.simsl Single-index models with a surface-link (workhorse function)
chicago Air pollution dataset
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Type Package
License GPL-3
Encoding UTF-8
LazyData true
RoxygenNote 6.1.1
NeedsCompilation no
Packaged 2021-02-09 18:21:19 UTC; parkh15
Repository CRAN
Date/Publication 2021-02-12 14:40:03 UTC

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