Creates a baseline column in several different ways. Helper for baseline_compare() but useful elsewhere too

Creates a baseline column in several different ways. Helper for baseline_compare() but useful elsewhere too

Usage

create_base(
  val_df,
  compare_col,
  base_lev,
  values_col,
  group_cols = NULL,
  failmissing = TRUE,
  names_to,
  values_to
)

val_df: dataframe of values
compare_col: column or columns to use for grouping- needed if the baseline is one level in this column. Otherwise ignored
base_lev: value for baseline. Can be a level in compare_col, or a scalar, or a vector of length(unique(val_df$compare_col)). A dataframe would be useful but not yet implemented.
values_col: column containing the values. Can be character or tidyselect or bare names, though the last are fragile.
group_cols: character, columns to group the baselining by. Often spatial or env_obj or similar.
failmissing: logical, default TRUE. Use tidyselect::any_of or tidyselect::all_of when values_col or compare_col are character. see selectcreator()
names_to: character, as in tidyr::pivot_longer(), used for auto-pivotting
values_to: character, as in tidyr::pivot_longer(), used for auto-pivotting

a tibble matching val_df (or a long version thereof if val_df is wide), with an added column for the reference level (named ref_values_col)