CalcThemAll.PRM (version 1.1.1)

Inverse_Weibull_Formula: Inverse Weibull Formula

Description

Inverse Weibull Formula

Usage

Inverse_Weibull_Formula(concentration, shape_location, scale)

Value

a numeric vector

Arguments

concentration

The vector of concentration values for a selected pesticide, that has a Inverse Weibull shaped species sensitivity distribution, to run the equation on.

shape_location

The Inverse Weibull shape/alpha value for the selected pesticide. These can be found in the "pesticide_info" data frame provided in this package. If you are including other pesticides you will need to append them with their respective distribution variables to the "pesticide_info" table.

scale

The Inverse Weibull scale/beta value for the selected pesticide. These can be found in the "pesticide_info" data frame provided in this package. If you are including other pesticides you will need to append them with their respective distribution variables to the "pesticide_info" table.

Examples

Hexazinone <- c(0.000000001, 0.5, 2.7, 11)
#Hexazinone is used as its species sensitivity distribution plots fits Inverse Weibull
Inverse_Weibull_Formula(concentration = Hexazinone,
shape_location = pesticide_info$shape_location[pesticide_info$pesticide == "Hexazinone"],
scale = pesticide_info$scale[pesticide_info$pesticide == "Hexazinone"])