curves data frame in the output of ecxsys() now contains a column with the concentrations which are used for the plot functions in this package. This is useful for generating a nicer concentration axis.ec():
response_value to effect in the output list.response_level of 0 or 100 is now allowed. 0 returns the concentration 0 and 100 returns the concentration Inf. Previously this resulted in an error.devtools::document()
devtools::check() without errors or warnings