plot method for sirspline-objectPlot SIR splines using R base graphics.
# S3 method for sirspline
plot(x, conf.int = TRUE, abline = TRUE, log = FALSE,
  type, ylab, xlab, ...)an object returned by function sirspline
logical; default TRUE draws also the 95 confidence intervals
logical; draws a reference line where SIR = 1
logical; default FALSE. Should the y-axis be in log scale
select type = 'n' to plot only figure frames
overwrites default y-axis label; can be a vector if multiple splines fitted
overwrites default x-axis label; can be a vector if multiple splines fitted
arguments passed on to plot()
In plot.sirspline almost every graphical parameter are user
adjustable, such as ylim, xlim.
plot.sirsplines calls lines.splines to add lines.
The plot axis without lines can be plotted using option type = 'n'. 
On top of the frame it's then possible to add a grid, 
abline or text before plotting the lines (see: sirspline).
Other sir functions: lines.sirspline,
  sir_exp, sir_ratio,
  sirspline, sir