cv_varsel.refmodel(): cv_search == "kfold"

[fweber144]

In cv_varsel.refmodel(), line

projpred/R/cv_varsel.R

Line 184 in 0cabd73

if (validate_search || cv_search == "kfold") {

uses cv_search == "kfold". But is cv_search == "kfold" possible? Should it read cv_method == "kfold" instead?

[fweber144]

Just for the sake of completeness (and for testing the fix): This issue was indeed able to raise an error in earlier versions on develop:

library(projpred)
library(rstanarm)
options(mc.cores = parallel::detectCores(logical = FALSE))
data('df_gaussian', package = 'projpred')
mydat <- cbind("y" = df_gaussian$y, as.data.frame(df_gaussian$x))
myfit <- stan_glm(y ~ V1 + V2 + V3 + V4 + V5,
                  family = gaussian(),
                  data = mydat,
                  prior = hs(df = 1, global_scale=0.01), seed = 1140350788)

cvs <- cv_varsel(
  myfit,
  method = "forward",
  cv_method = "kfold",
  validate_search = FALSE,
  K = 5
)

But this is fixed now by commit 021c7ef.