Description Usage Arguments Value
View source: R/robustregression.R
The first derivative of the optimal rho function.
1 | psi.powexp(u, c = 1.48, e = 2)
|
u |
vector of centered and scaled residuals |
c |
tuning constant. defaults to 1.48 |
e |
exponent; value greater than 0. defaults to 2. |
a numeric vector
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