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Calculates cumulative distribution values of the null distribution in the Durbin-Watson test. Uses saddle point approximation by Paolella (2007).
pdw(x, mod, data = list())
Numerical density value(s).
quantile value(s) at which the density should be determined.
estimated linear model object, formula (with data specified), or model matrix.
data
if mod is a formula then the name of the corresponding data frame has to be specified.
mod
Distribution depends on values of the exogenous variables. That is why it must be calculated from each specific data set, respectively.
Paolella, M.S. (2007): Intermediate Probability - A Computational Approach, Wiley.
ddw, dw.test.
ddw
dw.test
filter.est <- ols(sales ~ price, data = data.filter) pdw(x = c(0.9, 1.7, 2.15), filter.est)
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