[R] NULL column

[William Dunlap]

If you original read in the data with read.table, use its
row.names=NULL argument so it doesn't turn the first
character column with no duplicated entries into the
row.names.

> d <- read.table(text="
+ CAP beta0          beta1              pvalor        Crom
+ rs17      158.5980 12.252462 9.083193e-135        1
+ rs46      163.3730  3.304276  3.279925e-06          1
+ rs63      162.7924  2.084678  5.023893e-06          1
+ rs24      162.4252  1.837208  5.509042e-06          1
+ ",sep="",header=TRUE,  row.names=NULL)
> d
   CAP    beta0     beta1        pvalor Crom
1 rs17 158.5980 12.252462 9.083193e-135    1
2 rs46 163.3730  3.304276  3.279925e-06    1
3 rs63 162.7924  2.084678  5.023893e-06    1
4 rs24 162.4252  1.837208  5.509042e-06    1

Bill Dunlap
Spotfire, TIBCO Software
wdunlap tibco.com


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On Behalf
> Of arun
> Sent: Wednesday, August 08, 2012 3:06 PM
> To: Silvano Cesar da Costa
> Cc: R help
> Subject: Re: [R] NULL column
> 
> HI,
> Try this:
> 
> 
> dat1<-read.table(text="
>                     beta0          beta1              pvalor        Crom
> rs17      158.5980 12.252462 9.083193e-135        1
> rs46      163.3730  3.304276  3.279925e-06          1
> rs63      162.7924  2.084678  5.023893e-06          1
> rs24      162.4252  1.837208  5.509042e-06          1
> ",sep="",header=TRUE)
>  dat2<-data.frame(new=rownames(dat1),dat1)
> > rownames(dat2)<-1:nrow(dat2)
> > dat2
>   # new    beta0     beta1        pvalor Crom
> #1 rs17 158.5980 12.252462 9.083193e-135    1
> #2 rs46 163.3730  3.304276  3.279925e-06    1
> #3 rs63 162.7924  2.084678  5.023893e-06    1
> #4 rs24 162.4252  1.837208  5.509042e-06    1
> 
> 
> A.K.
> 
> 
> 
> ----- Original Message -----
> From: Silvano Cesar da Costa <silvano at uel.br>
> To: r-help at r-project.org
> Cc:
> Sent: Wednesday, August 8, 2012 3:22 PM
> Subject: [R] NULL column
> 
> Hi,
> 
> I have a dataset where the first column has no name.
> 
> I would like to assign a name to this column to be able to use it
> 
> something like:
> 
> Cap <-  NULL
> 
> 
> How can I do this?
> 
>                     beta0           beta1              pvalor        Crom
> rs17      158.5980 12.252462 9.083193e-135        1
> rs46      163.3730  3.304276  3.279925e-06           1
> rs63      162.7924  2.084678  5.023893e-06           1
> rs24      162.4252  1.837208  5.509042e-06           1
> 
> 
> How can I do this?
> 
> 
> Thanks,
> 
> 
> ---------------------------------------------
> Silvano Cesar da Costa
> 
> Universidade Estadual de Londrina
> Centro de Ciências Exatas
> Departamento de Estatística
> 
> Fone: (43) 3371-4346
> 
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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> 
> 
> ______________________________________________
> 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.