msn_scale

Scale the intensity of each peak in an MSn spectrum to that of the highest peak. MSn spectra are required to use this function.
See <code>read_mgf</code>.
Important Note
Please note that existing MSn spectra in <code>data</code> will be overwritten.

Facilitate tasks typically encountered during metabolomics data analysis including data import, filtering, missing value imputation (Stacklies et al. (2007) <doi:10.1093/bioinformatics/btm069>, Stekhoven et al. (2012) <doi:10.1093/bioinformatics/btr597>, Tibshirani et al. (2017) <doi:10.18129/B9.BIOC.IMPUTE>, Troyanskaya et al. (2001) <doi:10.1093/bioinformatics/17.6.520>), normalization (Bolstad et al. (2003) <doi:10.1093/bioinformatics/19.2.185>, Dieterle et al. (2006) <doi:10.1021/ac051632c>, Zhao et al. (2020) <doi:10.1038/s41598-020-72664-6>) transformation, centering and scaling (Van Den Berg et al. (2006) <doi:10.1186/1471-2164-7-142>) as well as statistical tests and plotting. 'metamorphr' introduces a tidy (Wickham et al. (2019) <doi:10.21105/joss.01686>) format for metabolomics data and is designed to make it easier to build elaborate analysis workflows and to integrate them with 'tidyverse' packages including 'dplyr' and 'ggplot2'.

Yannik Schermer

metamorphr

Tidy and Streamlined Metabolomics Data Workflows

msn_scale function

<dl><dt>data</dt>
<dd>A tidy tibble created by <code>read_featuretable</code>.</dd>
<dt>scale_to</dt>
<dd>A <code>numeric</code> that specifies to which number the highest signal in each spectrum will be scaled.</dd></dl>

Arguments

Scale intensities in MSn spectra to the highest value within each spectrum — msn_scale

<dl>

<dt>data</dt>
<dd>A tidy tibble created by <code>read_featuretable</code>.</dd>


<dt>scale_to</dt>
<dd>A <code>numeric</code> that specifies to which number the highest signal in each spectrum will be scaled.</dd>

</dl>

msn_scale: Scale intensities in MSn spectra to the highest value within each spectrum

Description

Usage

Value

Arguments

Examples