smooth

<code>smooth</code> performs smoothing of the intensity values.

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 

smooth function

<dl><dt>data</dt>
<dd>a list object. Data extracted from a cdf file,
ideally the output from extract_data().</dd>
<dt>lambda</dt>
<dd>a float object. A number (parameter in Whittaker
smoothing), suggested between 0 to 10^4. Small lambda is very little
smoothing, large lambda is very smooth. Default is lambda = 20.</dd>
<dt>dir</dt>
<dd>a string object. Either "X", "Y", or "XY" to indicate
direction of smoothing. "XY" indicates smoothing in both X (horizontal) and Y
(vertical) directions. Default "XY".</dd></dl>

Arguments

Smoothing — smooth

<dl>

<dt>data</dt>
<dd>a list object. Data extracted from a cdf file,
ideally the output from extract_data().</dd>


<dt>lambda</dt>
<dd>a float object. A number (parameter in Whittaker
smoothing), suggested between 0 to 10^4. Small lambda is very little
smoothing, large lambda is very smooth. Default is lambda = 20.</dd>


<dt>dir</dt>
<dd>a string object. Either "X", "Y", or "XY" to indicate
direction of smoothing. "XY" indicates smoothing in both X (horizontal) and Y
(vertical) directions. Default "XY".</dd>

</dl>

smooth: Smoothing

Description

Usage

Value

Arguments

Details

References

Examples