set_non_detects: Set value for 'non-detects'

In bcgov/wqbc: Tidy Water Quality Data and Calculate Thresholds for British Columbia

Set value for 'non-detects'

Description

Set a value where the actual value of a measurement is less than the method detection limit (MDL)

Usage

set_non_detects(
  value,
  mdl_flag = NULL,
  mdl_value = NULL,
  mdl_action = c("zero", "mdl", "half", "na")
)

Arguments

value	a numeric vector of measured values
mdl_flag	a character vector the same length as value that has a "flag" (assumed to be "<") for values that are below the MDL
mdl_value	a numeric vector the same length as value that contains the MDL values.
mdl_action	What to do with values below the detection limit. Options are "zero" (set the value to 0; the default), #' "half" (set the value to half the MDL), "mdl" (set the value to equal to the MDL), or "na" (set the value to NA).

Details

You must supply either mdl_flag or mdl_value, or both. When only mdl_flag is supplied, it is assumed that the original value has been set to the MDL, and will be adjusted according to the mdl_action. When only mdl_value is supplied then any value less than that will be adjusted appropriately using the corresponding mdl_value. When both mdl_flag and mdl_value are supplied, any value with a corresponding < in the mdl_flag vector will be adjusted appropriately using the corresponding mdl_value.

Value

a numeric vector the same length as value with non-detects adjusted accordingly

bcgov/wqbc documentation built on Feb. 11, 2023, 11:15 p.m.