splines2 steps sometimes gives uninformative warnings

[EmilHvitfeldt]

The warning could be better handled on our end since it doesn't specify which variables are the problem.

library(recipes)

recipe(~., data = mtcars) |>
  step_spline_b(vs, am) |>
  prep()
#> Warning in rcpp_bSpline(x = xx, df = df, degree = degree, internal_knots =
#> knots, : Set equidistant internal knots (found duplicated knots from
#> quantiles).

#> Warning in rcpp_bSpline(x = xx, df = df, degree = degree, internal_knots =
#> knots, : Set equidistant internal knots (found duplicated knots from
#> quantiles).
#> 
#> ── Recipe ──────────────────────────────────────────────────────────────────────
#> 
#> ── Inputs
#> Number of variables by role
#> predictor: 11
#> 
#> ── Training information
#> Training data contained 32 data points and no incomplete rows.
#> 
#> ── Operations
#> • Basis spline expansion: vs, am | Trained

^{Created on 2023-07-26 with reprex v2.0.2}

[EmilHvitfeldt]

expect it is kinda messy to deal with warnings...

[github-actions]

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