chem.scenarios: chem.scenarios

In HumanExposure/SHEDSDevel: The SHEDS-HT model for estimating human exposure to chemicals.

Description

This function summarizes the all.scenarios data set by condensing each chemical-scenario combination into one row. The number of rows of data for this combination on all.scenarios is recorded here.

Usage

chem.scenarios(all)

Arguments

all

This is the master list of all chemicals, and all exposure scenarios specific to each chemical, to be evaluated in the current model run. This data set is compiled internally according to the user's specifications on the Run_85687 file. The user may create multiple scenarios files for special purposes, for example, for selected chemical classes, or selected exposure pathways. A model run consists of two nested loops: the outer loop over chemicals and the inner loop over the scenarios specific to that chemical.

Value

chem.scen

A data set consisting of all chemicals of interest, and the categories and scenarios for that chemical with the potential for exposure. The relationship between chemicals and scenarios is one to many. It is possible for one chemical to have two or more "dermal" scenarios, provided each is in a different "category". However, each combination of chemical, category, and scenario must be unique. The last variable on chem.scen is "count", which is the number of rows of data on all.scenarios devoted to this combination.

Author(s)

Kristin Isaacs, Graham Glen

See Also

Run, Source_chem_foods, Source_chem_prods, Source_scen_food, Source_scen_prods

HumanExposure/SHEDSDevel documentation built on Oct. 30, 2019, 6:49 p.m.