Figure 2.

Length distributions of prophages found in fast- and slow-growing bacterial hosts (a), and pathogenic and non-pathogenic hosts (b). For a dataset of n prophages with lengths x_i, the cumulative distribution function (CDF) is constructed as CDF$(x)=\sum _{x_i<x}1/n$. For visualization, we show here a smoothed estimate of the probability density function, obtained by numerically differentiating this CDF.