Filters reference Database to only select natural elements
Usage
formula_filter(df, elements = NULL)
Arguments
- df
DataFrame of the reference database.
- elements
Vector of character strings of elements to include (default = c("H", "C", "N", "O", "S", "Cl", "Br", "F", "Na", "P", "I", "Si")).
Value
A refined DataFrame which only includes annotations containing the specified elements
Examples
## Get filtered DB by adduct
# db_1 <- db_adduct_filter(db, test_add_pos, polarity = "pos")
## Refine to only include natural elements
# db_2 <- formula_filter(db_1)
