A common interface for several methods to calculate the
Expected Value of (Partial) Perfect Information and the
Expected Value of Sample Information
A project of the ConVOI Group: the Collaborative Network for Value of Information
voi is pure “command-based” R, with no web interface
like SAVI.
The R commands in voi are clean and consistent: they
all have the same basic interface, so you can switch between
computational methods easily.
Outputs are all in “tidy” data frames for consistency, and to facilitate post-processing and plotting with modern tools such as ggplot2.
voi includes all the EVPPI
computation methods that are in SAVI (GAM
and Gaussian process regression), and includes the INLA method from BCEA.
Some other nonparametric regression methods ("earth",
"bart")
are included in voi, which may improve efficiency for
multiparameter EVPPI computation problems with large numbers of
parameters.
voi is the first package to implement a range of EVSI
computation methods: nonparametric regression, moment matching and
importance sampling. A simple model for the expected net
benefit of sampling is also included.voi will not benefit you if you want a web
interface, or if you just need single-parameter EVPPI and are happy with
SAVI/BCEA.
voi will benefit you if you want to calculate EVSI,
or multiparameter EVPPI with large numbers of parameters.
Stable version
install.packages("voi")Development version
remotes::install_github("chjackson/voi")voi
for Value of Information calculation: package overview