replacelt: Replace '<' with negative signs

In rivm-syso/achtergrondwaarden: Calculates background threshold concentrations for soil policy

Description

Replace '<' ('lesser than' sign) with '-' (negative sign) for the whole dataset and remove spaces while we're at it.

Usage

replacelt(x)

Arguments

x

data set

Value

Dataset where '<' is replaced with '-'

In Dutch environmental reports, chemical analyses with a result below the limit of quanitfication is often indicated with '<LOQ', where LOQ is the numerical value of the limit of quantification. This function replaces the '<' character with a minus. The LOQ value can then be turned into a negative numerical value.

When values below the limit of quantification are negative, it is easy to do calculations or imputations. With the function 'replaceNegative' such values can be replaced using a imputation factor.

rivm-syso/achtergrondwaarden documentation built on Jan. 22, 2020, 12:44 a.m.