[R] Remove a column of a matrix with unnamed column header

[arun]

Hi,
Try:
 test2 <- as.data.frame(test,stringsAsFactors=FALSE)
test2[,c(2:4)] <- lapply(test2[,c(2:4)],as.numeric)
A.K.




On Friday, November 8, 2013 6:24 AM, Kuma Raj <pollaroid at gmail.com> wrote:
Beend, Thanks for that. Conversion of test to a data frame resulted in a
factor. Is there a possibility to selectively convert to numeric?   I have
tried this code and that has not produced the intended result.
test[, c(2:4)] <- sapply(test[, c(2:4)], as.numeric)



On 8 November 2013 11:31, Berend Hasselman <bhh at xs4all.nl> wrote:

>
> On 08-11-2013, at 10:40, Kuma Raj <pollaroid at gmail.com> wrote:
>
> > I have a matrix names test which I want to convert to a data frame. When
> I
> > use a command  test2<-as.data.frame(test) it is executed without a
> problem.
> > But when I want to browse the content I receive an error message "Error
> in
> > data.frame(outcome = c("cardva", "respir", "cereb", "neoplasm",  :
> > duplicate row.names: Estimate" . The problem is clearly due to a
> duplicate
> > in  row name . But I am unable to remove this column. I need help on how
> to
> > remove this specific column that has essentially no column header name.
> > dput of the matrix is here:
> >
> >> dput(test)
> > structure(c("cardva", "respir", "cereb", "neoplasm", "ami", "ischem",
> > "heartf", "pneumo", "copd", "asthma", "dysrhy", "diabet",
> > "0.00259492159959046",
> > "0.00979775441709427", "0.00103414632535868", "0.00486468139227382",
> > "0.0164825543879707", "0.0116647168053943", "-0.0012137908515233",
> > "0.00730433232907741", "0.00355583994565985", "0.000712387285735019",
> > "-0.00103763671307935", "0.00981500221106926", "0.00325476724733837",
> > "0.0049232113728293", "0.00520118026087645", "0.00386848394426742",
> > "0.00688121694253705", "0.00585772614064902", "0.00564983058883797",
> > "0.0061328202328586", "0.0108212194251692", "0.0173804438930357",
> > "0.00867931407250442", "0.0106638104533486", "0.425323120845664",
> > "0.0466180768654915", "0.842402292743715", "0.208609687427072",
> > "0.0166336682608816", "0.0464833846710956", "0.8299010611324",
> > "0.233685747699204", "0.742469001175026", "0.967306766450795",
> > "0.904840885401235", "0.357394700741248"), .Dim = c(12L, 4L), .Dimnames =
> > list(
> >    c("Estimate", "Estimate", "Estimate", "Estimate", "Estimate",
> >    "Estimate", "Estimate", "Estimate", "Estimate", "Estimate",
> >    "Estimate", "Estimate"), c("outcome", "beta", "se", "pval"
> >    )))
> >
> >> test2<-as.data.frame(test)
> >> test2
> > Error in data.frame(outcome = c("cardva", "respir", "cereb", "neoplasm",
>  :
> >  duplicate row.names: Estimate
>
> rownames(test) <- NULL
>
> Berend
>
>

    [[alternative HTML version deleted]]


______________________________________________
R-help at r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.