Variable Penalty Dynamic Time Warping for aligning GC-MS chromatograms to a master signal and more. With the appropriate penalty this method performs good alignment without altering the shape of peaks in GC-MS data.
Please install the package in R directly using the commands:
install.packages("devtools")
devtools::install_github("david-clifford/VPdtw")Clifford, D., Stone, G., Montoliu, I., Rezzi, S., Martin, F. P., Guy, P., ... & Kochhar, S. (2009). Alignment using variable penalty dynamic time warping. Analytical chemistry, 81(3), 1000-1007. doi:http://dx.doi.org/10.1021/ac802041e
Clifford, D., & Stone, G. (2012). Variable Penalty Dynamic Time Warping Code for Aligning Mass Spectrometry Chromatograms in R. Journal of Statistical Software, 47(8), 1 - 17. doi:http://dx.doi.org/10.18637/jss.v047.i08