See details below for Rx specification. Actual parsing is done by parse_rx; this function can be used to debug Rx inputs.
ev_rx(x, y, ...)
# S4 method for mrgmod,character
ev_rx(x, y, ...)
# S4 method for character,missing
ev_rx(x, df = FALSE, ...)
parse_rx(x)a model object or character Rx input
character Rx input; see details
not used at this time
if TRUE then a data frame is returned
The method dispatched on model object (mrgmod) returns another
model object. The character method returns an event object. The
parse_rx function return a list named with
arguments for the event object constructor ev.
The dose is found at the start of the string by sequential digits; this may be integer, decimal, or in scientific notation
Use in to identify the dosing compartment number; must be integer
Use q to identify the dosing interval; must be integer or
decimal number (but not scientific notation)
Use over to indicate an infusion and its duration; integer or
decimal number
Use x to indicate total number of doses; must be integer
Use then or , to separate dosing periods
User after to insert a lag in the start of a period; integer or
decimal number (but not scientific notation)
# example("ev_rx")
ev_rx("100")
#> Events:
#> time amt cmt evid
#> 1 0 100 1 1
ev_rx("100 in 2")
#> Events:
#> time amt cmt evid
#> 1 0 100 2 1
ev_rx("100 q12 x 3")
#> Events:
#> time amt ii addl cmt evid
#> 1 0 100 12 2 1 1
ev_rx("100 over 2")
#> Events:
#> time amt rate cmt evid
#> 1 0 100 50 1 1
ev_rx("100 q 24 x 3 then 50 q12 x 2")
#> Events:
#> time amt ii addl cmt evid
#> 1 0 100 24 2 1 1
#> 2 72 50 12 1 1 1
ev_rx("100 then 50 q 24 after 12")
#> Events:
#> time amt ii addl cmt evid
#> 1 0 100 0 0 1 1
#> 2 12 50 24 0 1 1
ev_rx("100.2E-2 q4")
#> Events:
#> time amt ii cmt evid
#> 1 0 1.002 4 1 1
ev_rx("100 over 2.23")
#> Events:
#> time amt rate cmt evid
#> 1 0 100 44.84305 1 1
ev_rx("100 q 12 x 3")
#> Events:
#> time amt ii addl cmt evid
#> 1 0 100 12 2 1 1
parse_rx("100 mg q 24 then 200 mg q12")
#> [[1]]
#> [[1]]$time
#> [1] 0
#>
#> [[1]]$cmt
#> [1] 1
#>
#> [[1]]$amt
#> [1] 100
#>
#> [[1]]$ii
#> [1] 24
#>
#>
#> [[2]]
#> [[2]]$time
#> [1] 0
#>
#> [[2]]$cmt
#> [1] 1
#>
#> [[2]]$amt
#> [1] 200
#>
#> [[2]]$ii
#> [1] 12
#>
#>