addAnnotations {CluMSID} | R Documentation

## Adding external annotations to list of `MS2spectrum` objects

### Description

`addAnnotations` is used to add annotations that have been assigned externally, e.g. by library search, to a list of `MS2spectrum` objects as produced by `extractMS2spectra` and `mergeSpecList`.

### Usage

    addAnnotations(featlist, annolist, annotationColumn = 4)

### Arguments

`featlist` | A list of `MS2spectrum` objects as produced by `extractMS2spectra` and `mergeSpecList`
`annolist` | A list of annotations, either as a `data.frame` or csv file. The order of features must be the same as in `featlist`. Please see the package vignette for a detailed example!
`annotationColumn` | The column of `annolist` were the annotation is found. Default is `4`, which is the case if `writeFeaturelist` followed by manual addition of annotations, e.g. in Excel, is used to generate `annolist`.

### Value

A list of `MS2spectrum` objects as produced by `extractMS2spectra` and `mergeSpecList` with external annotations added to the `annotation` slot of each `MS2spectrum` object.

### Examples

    load(file = system.file("extdata",
        "featlist.RData",
        package = "CluMSIDdata"))

    addAnnotations(featlist, system.file("extdata",
                    "post_anno.csv",
                    package = "CluMSIDdata"),
                    annotationColumn = 4)

[Package CluMSID version 1.2.1 Index]