R: Calculation of warping coefficients when applying more than...
calc.multicoef
R Documentation
Calculation of warping coefficients when applying more than one
warping function successively
Description
Applying two (or more) warping function after each other
can be described with one warping function of a higher warping
degree. This function provides the coefficients of this higher degree
warping function.
Usage
calc.multicoef(coef1, coef2)
Arguments
coef1
vector containing the warping coefficients of the first
applied warping function
coef2
vector containing the warping coefficients of the second
applied warping function
Details
This function uses Pascal's simplex to calculate the new
warping coefficients.
When applying three warping functions successively (first a, then b and
finally c - here a, b and c are vectors of warping coefficients), first
calculate the new coefficients for b and c, and afterwards the
coefficients for a with these new coefficients. So the coefficients for
the total warping function can be calculated via calc.multicoef(a,
calc.multicoef(b, c)).
Value
a vector containing the corrected warping coefficients
Author(s)
Jan Gerretzen
References
Bloemberg, T.G., et al. (2010) "Improved parametric time warping for Proteomics", Chemometrics and Intelligent Laboratory Systems, 104 (1), 65 – 74.