psi_equation_cpp {distantia} | R Documentation |
(C++) Equation of the Psi Dissimilarity Score
Description
Equation to compute the psi
dissimilarity score
(Birks and Gordon 1985). Psi is computed as \psi = (2a / b) - 1
,
where a
is the sum of distances between the relevant samples of two
time series, and b
is the cumulative sum of distances between
consecutive samples in the two time series.
If a
is computed with dynamic time warping, and diagonals are used in the
computation of the least cost path, then one is added to the result of the equation above.
Usage
psi_equation_cpp(a, b, diagonal = TRUE)
Arguments
a |
(required, numeric) output of |
b |
(required, numeric) auto sum of both sequences,
result of |
diagonal |
(optional, logical). Must be TRUE when diagonals are used in dynamic time warping and for lock-step distances. Default: FALSE. |
Value
numeric
See Also
Other Rcpp_dissimilarity_analysis:
psi_dtw_cpp()
,
psi_ls_cpp()
,
psi_null_dtw_cpp()
,
psi_null_ls_cpp()