Take two numeric vectors and return the Akaike Information
Criterion (AIC).
AIC is computed from the Residuals Sum of Square
rss and
the number of used parameters.
Usage
AIC_(x, y, nbK)
Arguments
x, y
two numeric vectors of same length.
nbK
an integer. nbK is the number of used parameters.
nbK > 1 : returns NA if not.