data frame including columns Aika (character string indicating the date), Alue (character string indicating the region) and val (numeric indicating the number of new cases)
pop
data frame including columns Alue (character string indicating the region) and val (integer indicating the population)
regions
vector of characters strings indicating the regions for which the selected statistic is plotted
start
beginning date of the time window for which the curve is plotted
end
ending date of the time window for which the curve is plotted
measure
statistic to be plotted
atop
logical indicating if the bars of different regions are plotted on top of one another
perMillion
logical indicating if the statistic is proportioned to a population of million
drawMean
logical indicating if a smoothed curve (rolling mean of 7 observations) is plotted