For each of the polypeptides in a vector, find its multiple-charged species in the vector.
Usage
is.multiple(v, k = 2, eps = 0.003)
Arguments
v
a vector of polypeptides.
k
a vector of integers, that is, multiples of interest.
eps
a user specified precision of peak position.
Value
A list named with the m/z values of polypeptides who have
multiple-charged species; each component is a named vector
of polypeptides with number of charges as names.