Table 2:

Getting Started with httk.

Where Do I Get R?	R is freely available from the Comprehensive R Archive Network (CRAN): https://cloud.r-project.org/ Graphical user interface (GUI), RStudio, is freely available: https://rstudio.com/
Getting Started with R Package httk	install.packages(httk) RStudio provides a menu “Install Packages” under “Tools” tab
Load the HTTK data, models, and functions	library(httk)
Check what version you are using	packageVersion(httk)
Getting help with R Package httk	help(httk) You can go straight to the index: help(package=httk)
List all CAS numbers for all chemicals with sufficient data to run httk	get_cheminfo()
List all information:	get_cheminfo(info=“all”)
Is a chemical with a specified CAS number available?	“80-05-7” %in% get_cheminfo()
All data on chemicals A, B, C	subset(get_cheminfo(info=“all”),Compound%in%c(“A”,”B”,”C”))
Administrated equivalent dose (mg/kg BW/day) to produce 0.1 uM plasma concentration, 0.95 quantile, for a specified CAS number and species	calc_mc_oral_equiv(0.1,chem.cas=“34256–82-1”, species=“human”)
Calculate the mean, AUC, and peak concentrations for a simulated study (28-day daily dose, by default) for a specified CAS number and species	calc_tkstats(chem.cas=“34256–82-1”, species=“rat”)
Using the PBTK solver for a specified chem name	solve_pbtk(chem.name=“bisphenol a”, plots=TRUE)
List all vignettes for httk	vignette(package=httk)
Displays the vignette for a specified vignette	vignette(“Frank2018”)
Create data set, my_data, for all data on chemicals A, B, C, in R	my_data <- subset(get_cheminfo(info=“all”),Compound%in%c(“A”,”B”,”C”))
Export data set, my_data, from R to csv file called my_data.csv in the current working directory	write.csv(my_data, file = “my_data.csv”)