Generate correlation matrix and select variables to remove

Usage

make_env_corr(
  env_df,
  env_cols,
  remove = TRUE,
  thresh = 0.95,
  always_remove = c("lat", "long"),
  always_keep = c("prec", "temp")
)

env_df: Dataframe with environmental variables
env_cols: Numeric or character vector defining columns in env_df that contain the variables to test for correlation.
remove: Logical. Remove variables correlated at or above thresh. Correlation is found via caret::findCorrelation().
thresh: Numeric. Threshold correlation value before variable is removed.
always_remove: Character vector. Any string in this vector, if matched, will always be removed (even if not correlated).
always_keep: Character vector. Any string in this vector, if matched, will not be removed (even if correlated).

list with elements itemize