DAPAR (version 1.4.7)

getNumberOf: Number of lines with prefix

Description

Returns the number of lines, in a given column, where content matches the prefix.

Usage

getNumberOf(obj, name = NULL, prefix = NULL)

Arguments

obj

An object of class MSnSet.

name

The name of a column.

prefix

A string

Value

An integer

Examples

data(UPSpep25)
getNumberOf(UPSpep25, "Potential.contaminant", "+")