separate_polarity: Separate positive and negative modes in MS2 library
In QizhiSu/mspcompiler: Compile Mass Spectral Libraries from Various Sources

separate_polarity

R Documentation

Separate positive and negative modes in MS2 library

Description

separate_polarity offers a way to separate a MS2 library based on polarity.

Usage

separate_polarity(lib, polarity)

Arguments

`lib`	A MS2 library mixed with positive and negative modes.
`polarity`	The polarity, can be either "pos" or "neg"

Details

Some libraries, e.g., NIST and GNPS have both positive and negative MS2 records mixed in a singled file. However, in practice, a MS2 library should be either positive or negative based on the polarity used in the experiment. Therefore, this function provides a way to separate positive and negative modes in MS2 library.