For a projection object (returned by project(), possibly as elements of a
list), this function extracts the combination of predictor terms onto which
the projection was performed.
predictor_terms(object, ...)
# S3 method for projection
predictor_terms(object, ...)An object of class projection (returned by project(),
possibly as elements of a list) from which to retrieve the predictor
terms.
Currently ignored.
A character vector of predictor terms.
# Data:
dat_gauss <- data.frame(y = df_gaussian$y, df_gaussian$x)
# The `stanreg` fit which will be used as the reference model (with small
# values for `chains` and `iter`, but only for technical reasons in this
# example; this is not recommended in general):
fit <- rstanarm::stan_glm(
y ~ X1 + X2 + X3 + X4 + X5, family = gaussian(), data = dat_gauss,
QR = TRUE, chains = 2, iter = 500, refresh = 0, seed = 9876
)
# Projection onto an arbitrary combination of predictor terms (with a small
# value for `nclusters`, but only for the sake of speed in this example;
# this is not recommended in general):
prj <- project(fit, predictor_terms = c("X1", "X3", "X5"), nclusters = 10,
seed = 9182, verbose = FALSE)
print(predictor_terms(prj)) # gives `c("X1", "X3", "X5")`
#> [1] "X1" "X3" "X5"