Sometimes want to plot p-values (e.g., volcano plot or MA-plot), but if a
statistical test returns a zero p-value, this causes problems with
visualization on the log scale. This function returns a vector where the
zero values are equal to the smallest nonzero value in the vector.
Usage
lowestnonzero(x)
Value
A vector of p-values where zero values are exchanged for the lowest non-zero p-value in the original vector.