R package ptw. Parametric Time Warping aligns patterns, i.e. it aims to put corresponding features at the same locations. The algorithm searches for an optimal polynomial describing the warping. It is possible to align one sample to a reference, several samples to the same reference, or several samples to several references. One can choose between calculating individual warpings, or one global warping for a set of samples and one reference. Two optimization criteria are implemented: RMS (Root Mean Square error) and WCC (Weighted Cross Correlation). Both warping of peak profiles and of peak lists are supported.

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References in zbMATH (referenced in 1 article )

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  1. David Clifford; Glenn Stone: Variable Penalty Dynamic Time Warping Code for Aligning Mass Spectrometry Chromatograms in R (2012) not zbMATH