> r1 <- runif(1000, 0.0, 1.0)
> r2 <- runif(1000, 0.0, 1.0)
> dwtest(lm(r2 ~ r1 ))

    Durbin-Watson test

data:  lm(r2 ~ r1)
DW = 1.9806, p-value = 0.3789
alternative hypothesis: true autocorrelation is greater than 0

>
> r1 <- seq(0, 1000, by=1)
> r2 <- seq(0, 1000, by=1)
> dwtest(lm(r2 ~ r1 ))

    Durbin-Watson test

data:  lm(r2 ~ r1)
DW = 2.2123, p-value = 0.8352