search for: pcpopulation

Displaying 2 results from an estimated 2 matches for "pcpopulation".

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2010 Sep 21
3
Error in eval(expr, envir, enclos)
...ew basic command lines. I was running a robust regression in R, using the following command line library (MASS) rfdmodel1 <- rlm (TotalEmployment_2004 ~ MISSISSIPPI + LOUISIANA + TotalEmployment_2000 + PCWhitePop_2004 + UnemploymentRate_2004 + PCUrbanPop2000 + PCPeopleWithACollegeDegree_2000 + PCPopulation.of.or.over.65.years.of.age_2004) summary (rfdmodel1) But, I keep getting this error: Error in eval(expr, envir, enclos) : object 'TotalEmployment_2004' not found > summary (rfdmodel1) Error in summary(rfdmodel1) : object 'rfdmodel1' not found I have tried using a different...
2010 Aug 17
0
Singular error in rlm
...command lines. I was running a robust regression in R, using the following command line library (MASS) rfmodel2 <- rlm (TotalEmployment_2005 ~ ALABAMA + MISSISSIPPI + LOUISIANA + TotalEmployment_2000 + PCWhitePop_2005 + UnemploymentRate_2005 + PCUrbanPop2000 + PCPeopleWithACollegeDegree_2000 + PCPopulation.of.or.over.65.years.of.age_2005) summary (rfmodel2) But, it keeps giving me an error message as soon as I try to run it Error in rlm.default(x, y, weights, method = method, wt.method = wt.method, : 'x' is singular: singular fits are not implemented in rlm I used the above mentioned co...