ToxModifier: Size-dependent Toxicity Modifier

In npollesch/FishToxTranslator: The Fish Toxicity Translator

Description

Two built in functions to modify survival dercrement based on either a linear interpolation of toxicity effects or a step function for size classes

Usage

ToxModifier(
  z,
  toxModType,
  toxMultU,
  toxMultL,
  upperBound,
  lowerBound,
  zPartition,
  toxModVec
)

Arguments

z	Size at the beginning of the timestep [float or vector]
toxModType	String to switch between the two current options, "linear", or "step"
toxMultU	Toxicity multiplier at upper bound size 'upperBound' [float]
toxMultL	Toxicity multiplier at lower bound size 'lowerBound' [float]
upperBound	Upper size limit in the model [float]
lowerBound	Lower size limit in the model [float]
zPartition	Size partition of the size range. Uses 'stepfun' from 'stats' package, please see help for additional details on using 'stepfun' [vector]
toxModVec	Multipliers for each component of 'zPartition' vector [vector]

Details

Linear: Linear transition between largest and smallest classes

ToxModifier(z) =((toxMultU-toxMultL)/(upperBound-lowerBound))*(z-upperBound)+toxMultU

Step: Step function to assign discrete multipliers to size classes

ToxModifier(z) = ∑_{i=0}^{n}{mVec_i * \textbf{1}_{\zPartition_{i}}(z)}

Value

Toxicity multiplier as a function of size [float]

npollesch/FishToxTranslator documentation built on May 23, 2021, 3:21 a.m.