CohortSizeMin-class: Size based on minimum of multiple cohort size rules
In 0liver0815/onc-crmpack-test: Object-Oriented Implementation of CRM Designs

This class can be used to combine multiple cohort size rules with the MIN operation.

cohortSizeList contains all cohort size rules, which are again objects of class CohortSize. The minimum of these individual cohort sizes is taken to give the final cohort size.

cohortSizeList: list of cohort size rules

# Rule for having cohort of size 1 for doses <30
#      and having cohort of size 3 for doses >=30
mySize1 <- CohortSizeRange(intervals = c(0, 10),
                           cohortSize = c(1, 3))

# Rule for having cohort of size 1 until no DLT were observed
#      and having cohort of size 3 as soon as 1 DLT is observed
mySize2 <- CohortSizeDLT(DLTintervals=c(0, 1),
                         cohortSize=c(1, 3))

# Create a list of cohort size rules of class 'CohortSizeMax' which will then be 
# combined with the 'min' operation
mySize <- CohortSizeMin(cohortSizeList=list(mySize1, 
                                            mySize2))