Constructor for projections objects

This function builds a valid projections object from some input simulations and dates.

build_projections(x, dates = NULL, cumulative = FALSE, order_dates = TRUE)

Arguments

x	A `matrix` of simulated incidence stored as integers, where rows correspond to dates and columns to simulations.
dates	A vector of dates containing one value per row in `x`; acceptable formats are: `integer`, `Date`, and `POSIXct`; if NULL, the time steps will be counted, with the first dates corresponding to 0.
cumulative	A logical indicating if data represent cumulative incidence; defaults to `FALSE`.
order_dates	A logical indicating whether the dates should be ordered, from the oldest to the most recent one; `TRUE` by default.