[R] Error in Quantile Regression - Clear Message

[Uwe Ligges]

ricardosilva at serasa.com.br wrote:
> Dear Users,
> I loaded my dataset as following:
> 
> presu <- read.table("C:/_Ricardo/Paty/qtdata_f.txt", header=TRUE, sep="\t",
> na.strings="NA", dec=".", strip.white=TRUE)
> dep<-presu[,3];
> exo<-presu[,4:92];
> 
> When I try:
> 
> rq(dep ~ exo, ...) or mle.stepwise(dep ~ exo, ...)
> I got the same error:
>> rq(dep ~ exo)
> Error in model.frame(formula, rownames, variables, varnames, extras,
> extranames,  :
>         invalid variable type for 'exo'
> 
> Any hint in how to fix it? I think this is due my data format.


Maybe, but you will have to tell us the class() and mode() of "exo", 
some output of the str() function would be fine.

Uwe Ligges


> Thanks,
> 
> ________________________________________
> Ricardo Gonçalves Silva, M. Sc.
> Apoio aos Processos de Modelagem Matemática
> Econometria & Inadimplência
> Serasa S.A.
> (11) - 6847-8889
> ricardosilva at serasa.com.br
> 
> __________________
> 
> 
> Hi,
> 
> I load my data set and separate it as folowing:
> 
> presu <- read.table("C:/_Ricardo/Paty/qtdata_f.txt", header=TRUE, sep="\t",
> na.strings="NA", dec=".", strip.white=TRUE)
> dep<-presu[,3];
> exo<-presu[,4:92];
> 
> Now, I want to use it using the wls and quantreg packages. How I change the
> data classes for mle and rq objects?
> 
> Thanks a lot,
> Ricardo
> 
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