MassSpecWavelet-package
(Package: MassSpecWavelet) :
Peak detection of mass spectrum by Wavelet transform based methods
Process Mass Spectrum (MS) by Wavelet Transforms-based algorithms
● Data Source:
BioConductor
● Keywords: package
● Alias: MassSpecWavelet, MassSpecWavelet-package
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cwt
(Package: MassSpecWavelet) :
Continuous Wavelet Transform (CWT)
CWT(Continuous Wavelet Transform) with Mexican Hat wavelet (by default) to match the peaks in Mass Spectrometry spectrum
● Data Source:
BioConductor
● Keywords: methods
● Alias: cwt
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1 images
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Extend the length of a signal or matrix by row
● Data Source:
BioConductor
● Keywords: methods
● Alias: extendLength
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extendNBase
(Package: MassSpecWavelet) :
Extend the row number of a matrix as the exponential of base N
Extend the data as the exponential of base N by increasing row number.
● Data Source:
BioConductor
● Keywords: methods
● Alias: extendNBase
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0 images
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getLocalMaximumCWT
(Package: MassSpecWavelet) :
Identify the local maximum of each column in 2-D CWT coefficients matrix
Identify the local maximum of each column in 2-D CWT coefficients matrix by using a slide window. The size of slide window linearly changes from the coarse scale (bigger window size) to detail scale. The scale of CWT increases with the column index.
● Data Source:
BioConductor
● Keywords: methods
● Alias: getLocalMaximumCWT
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1 images
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getRidge
(Package: MassSpecWavelet) :
Identify ridges based on the local maximum matrix
Identify ridges by connecting the local maximum of 2-D CWT coefficients from the coarse scale to detail scale. The local maximum matrix is returned from getLocalMaximumCWT
● Data Source:
BioConductor
● Keywords: methods
● Alias: getRidge
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1 images
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Estimate the length of the ridge line, which is composed of local maxima at adjacent CWT scales. The ridge line is cut off at the end point, whose amplitude divided by the maximum ridge amplitude is larger than the cutoff amplitude ratio threshold (0.5 by default).
● Data Source:
BioConductor
● Keywords: methods
● Alias: getRidgeLength
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0 images
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getRidgeValue
(Package: MassSpecWavelet) :
Get the CWT coefficient values corresponding to the peak ridge
Get the CWT coefficient values corresponding to the peak ridge
● Data Source:
BioConductor
● Keywords: methods
● Alias: getRidgeValue
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0 images
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identifyMajorPeaks
(Package: MassSpecWavelet) :
Identify peaks based on the ridges in 2-D CWT coefficient matrix
Indentify the peaks based on the ridge list (returned by getRidge) in 2-D CWT coefficient matrix and estimated Signal to Noise Ratio (SNR)
● Data Source:
BioConductor
● Keywords: methods
● Alias: identifyMajorPeaks
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1 images
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localMaximum
(Package: MassSpecWavelet) :
Identify local maximum within a slide window.
Find local maximum by transform the vector as matrix, then get the the maximum of each column. This operation is performed twice with vecctor shifted half of the winSize.
● Data Source:
BioConductor
● Keywords: methods
● Alias: localMaximum
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1 images
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