Numeric vector with quasi optimal \(\rho\) computation for each element
of x.
Arguments
x
numeric vector with positive values.
cc
tunning constant.
References
[1] Salibian-Barrera, M., Willems, G., & Zamar, R. (2008). The fast-tau
estimator for regression. Journal of Computational and GraphicalStatistics,
17(3), 659-682.