
115Implementation
that implement algorithms for distributions that do not have a closed form
of the quantile function.
Using general software, the equation for the required quantile function is
written into the code that computes event times. It is helpful to create a func-
tion that does this for each type of distribution and to call that function in
the code. In spreadsheets, the formula (see Table3.14) is written into the cells
of the column where that event’s times are calculated. If the chosen spread-
sheet software allows for creating user-dened functions, then it is helpful
to do so for each type of time-to-event equation that will be used. ...