Hi, It works! Only one thing we need to note is when we have only one
column name as an output we do not get the results.
> d=c(11:21)
> e=c(51:61)
> data<-data.frame(embed(1:12,2))
> data=cbind(data,d,e)
> data>6
X1 X2 d e
[1,] FALSE FALSE TRUE TRUE
[2,] FALSE FALSE TRUE TRUE
[3,] FALSE FALSE TRUE TRUE
[4,] FALSE FALSE TRUE TRUE
[5,] FALSE FALSE TRUE TRUE
[6,] TRUE FALSE TRUE TRUE
[7,] TRUE TRUE TRUE TRUE
[8,] TRUE TRUE TRUE TRUE
[9,] TRUE TRUE TRUE TRUE
[10,] TRUE TRUE TRUE TRUE
[11,] TRUE TRUE TRUE TRUE
> data<-data.frame(data)
*> names(data[,which(apply(data,2,FUN = function(x){all(x>6)}))])*
[1] "d" "e"
Thanks
On Thu, Oct 16, 2014 at 3:26 PM, PIKAL Petr <petr.pi...@precheza.cz> wrote:
> Hi
>
> > -----Original Message-----
> > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r-
> > project.org] On Behalf Of Vikash Kumar
> > Sent: Thursday, October 16, 2014 7:06 AM
> > To: adam.n.jenkin...@gmail.com
> > Cc: r-help@r-project.org
> > Subject: Re: [R] Retrieving lists of colnames
> >
> > Hi Adam,
> >
> > I guess below code would help you achieve the desired ouput.
> >
> > > colnames(data[,which(apply(data,2,FUN = function(x){any(x>0.5)}))])
>
> I do not think so. It will give you overall names but not names for each
> row, which as I understand Adam needs.
>
> Try
>
> > data<-data.frame(embed(1:12,2))
> > data<6
> X1 X2
> [1,] TRUE TRUE
> [2,] TRUE TRUE
> [3,] TRUE TRUE
> [4,] TRUE TRUE
> [5,] FALSE TRUE
> [6,] FALSE FALSE
> [7,] FALSE FALSE
> [8,] FALSE FALSE
> [9,] FALSE FALSE
> [10,] FALSE FALSE
> [11,] FALSE FALSE
>
> > colnames(data[,which(apply(data,2,FUN = function(x){any(x<6)}))])
> [1] "X1" "X2"
>
>
> > lll<-vector(nrow(data), mode="list")
> > for(i in 1:nrow(data)) lll[[i]]<-colnames(data)[(which(data[i,]<6))]
> > lll
> [[1]]
> [1] "X1" "X2"
>
> [[2]]
> [1] "X1" "X2"
>
> [[3]]
> [1] "X1" "X2"
>
> [[4]]
> [1] "X1" "X2"
>
> [[5]]
> [1] "X2"
>
> [[6]]
> character(0)
>
> [[7]]
> character(0)
>
> [[8]]
> character(0)
>
> [[9]]
> character(0)
>
> [[10]]
> character(0)
>
> [[11]]
> character(0)
>
>
> Cheers
> Petr
>
>
> >
> > Happy Learning!
> >
> > Vikash
> >
> > On Wed, Oct 15, 2014 at 5:53 PM, adam.n.jenkin...@gmail.com <
> > adam.n.jenkin...@gmail.com> wrote:
> >
> > >
> > >
> > > Hi what I have is a large excel doc (100 columns, 350 row) with data
> > > values from 0-10000. The end goal is for each row to have a list of
> > > colnames of which columns contain values >0. I've been tinkering
> > > around with apply mostly and some other functions, any help offered
> > > would be greatly appreciated.
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> > >
> >
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