acc: Auto Cross Covariance (ACC) for Generating Scales-Based Descriptors
of the Same Length
Description
Auto Cross Covariance (ACC) for Generating Scales-Based Descriptors
of the Same Length
Usage
acc(mat, lag)
Arguments
mat
A p * n matrix. Each row represents one scale
(total p scales), each column represents one amino acid position
(total n amino acids).
lag
The lag parameter. Must be less than the amino acids.
Value
A length lag * p^2 named vector, the element names are
constructed by: the scales index (crossed scales index) and lag index.
Details
This function calculates the auto covariance and auto cross covariance
for generating scale-based descriptors of the same length.
References
Wold, S., Jonsson, J., Sj\"orstr\"om, M., Sandberg,
M., & R\"annar, S. (1993).
DNA and peptide sequences and chemical processes multivariately modelled
by principal component analysis and partial least-squares projections
to latent structures.
Analytica chimica acta, 277(2), 239--253.
Sj\"ostr\"om, M., R\"annar, S., & Wieslander, A. (1995).
Polypeptide sequence property relationships in Escherichia coli
based on auto cross covariances.
Chemometrics and intelligent laboratory systems, 29(2), 295--305.