thr_peaks

<code>thr_peaks</code> finds all peaks above the given threshold.

Provides complete detailed preprocessing of two-dimensional gas chromatogram (GCxGC) samples. Baseline correction, smoothing, peak detection, and peak alignment. Also provided are some analysis functions, such as finding extracted ion chromatograms, finding mass spectral data, targeted analysis, and nontargeted analysis with either the 'National Institute of Standards and Technology Mass Spectral Library' or with the mass data. There are also several visualization methods provided for each step of the preprocessing and analysis.

Stephanie Gamble

gcxgclab

GCxGC Preprocessing and Analysis

Mannion Joseph

Granger Caroline

Battelle Savannah River Alliance 

NNSA, US DOE 

thr_peaks function

<dl><dt>TIC_df</dt>
<dd>a data.frame object. Data frame with 4 columns
(Overall Time Index, RT1, RT2, TIC), ideally the output from create_df(), or
the first data frame returned from extract_data(), $TIC_df.</dd>
<dt>THR</dt>
<dd>a float object. Threshold for peak intensity. Should be a
number between the baseline value and the highest peak intensity. Default
suggestion is THR = 100000.</dd></dl>

Arguments

Threshold Peaks — thr_peaks

<dl>

<dt>TIC_df</dt>
<dd>a data.frame object. Data frame with 4 columns
(Overall Time Index, RT1, RT2, TIC), ideally the output from create_df(), or
the first data frame returned from extract_data(), $TIC_df.</dd>


<dt>THR</dt>
<dd>a float object. Threshold for peak intensity. Should be a
number between the baseline value and the highest peak intensity. Default
suggestion is THR = 100000.</dd>

</dl>

thr_peaks: Threshold Peaks

Description

Usage

Value

Arguments

Details

Examples