search for: area_fract

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2009 Jun 30
2
odd behaviour in quantreg::rq
Hi, I am trying to use quantile regression to perform weighted-comparisons of the median across groups. This works most of the time, however I am seeing some odd output in summary(rq()): Call: rq(formula = sand ~ method, tau = 0.5, data = x, weights = area_fraction) Coefficients: Value Std. Error t value Pr(>|t|) (Intercept) 45.44262 3.64706 12.46007 0.00000 methodmukey-HRU 0.00000 4.67115 0.00000 1.00000 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ When I do not include the weights, I get something a little cl...