Modify the value of existing items

Usage

modify_item_seq(...)

Arguments

...: A list of items and their values or expressions. Will be evaluated sequentially (so one could have list(a= 1, b = a +2 ))

Value

No return value, modifies/adds items sequentially and deploys to the environment and with the main list for storage

Details

The functions to add/modify events/inputs use lists. Whenever several inputs/events are added or modified, it's recommended to group them within one function, as it reduces the computation cost. So rather than use two modify_item with a list of one element, it's better to group them into a single modify_item with a list of two elements.

Costs and utilities can be modified by using the construction type_name_category, where type is either "qaly" or "cost", name is the name (e.g., "default") and category is the category used (e.g., "instant"), so one could pass cost_default_instant and modify the cost. This will overwrite the value defined in the corresponding cost/utility section.

The function is different from modify_item in that this function evaluates sequentially the arguments within the list passed. This implies a slower performance relative to modify_item, but it can be more cleaner and convenient in certain instances.

This function is intended to be used only within the add_reactevt function in its input parameter and should not be run elsewhere or it will return an error.

Examples

add_reactevt(name_evt = "idfs",input = {
  modify_item_seq(list(cost.idfs = 500, cost.tx = cost.idfs + 4000))
  })
#> $idfs
#> $idfs$react
#> {
#>     modify_item_seq(list(cost.idfs = 500, cost.tx = cost.idfs + 
#>         4000))
#> }
#> 
#>