R help - Jul 2006 - Error in Quantile Regression - Clear Message

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.

Thanks,

________________________________________
Ricardo Gon?alves Silva, M. Sc.
Apoio aos Processos de Modelagem Matem?tica
Econometria & Inadimpl?ncia
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

______________________________________________
R-help at stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
 PLEASE do read the posting guide!
 http://www.R-project.org/posting-guide.html

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 Gon?alves Silva, M. Sc.
> Apoio aos Processos de Modelagem Matem?tica
> Econometria & Inadimpl?ncia
> 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
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
>  PLEASE do read the posting guide!
>  http://www.R-project.org/posting-guide.html
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
http://www.R-project.org/posting-guide.html