Description Usage Arguments Details Value Examples

For each of the polypeptides in a vector, find its multiple-charged species in the vector.

1 | ```
is.multiple(v, k = 2, eps = 0.003)
``` |

`v` |
a vector of polypeptides. |

`k` |
a vector of integers, that is, multiples of interest. |

`eps` |
a user specified precision of peak position. |

If abs(v-k*u)/v <= eps, then v is considered to be u with k charges.

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.

1 2 3 4 | ```
bmks <- c(2360.25, 2666.34, 3055.72, 3058.04,
3776.94, 3778.24, 3779.53, 4712.37,7559.76, 4587.03,
4589.88, 9155.59, 13298.7)
is.multiple(bmks, k=2:5)
``` |

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