R help - Feb 2016 - Convert list to data frame

Hi,

I  read data from file as follows

Data<-read.table("file.txt",header=T,sep="\t")

mode(Data)
list

I want to convert data to data frame, I tried the following:

as.data.frame(Data)
data.frame(Data)

But the Data did not change

When I tried
as.data.frame(unlist(Data))

The Data converted to a vector not to a data frame. Any idea ?

Thank you in advance

On Monday, February 15, 2016, <asma.rabe at gmail.com> wrote:
> Hi,
>
> I  read data from file as follows
>
> Data<-read.table("file.txt",header=T,sep="\t")
>
> mode(Data)
> list

Data is a data frame; that's what read.table() produces. A data frame is a
special type of list.

Take a look at
class(Data)


>
> I want to convert data to data frame, I tried the following:
>
> as.data.frame(Data)
> data.frame(Data)
>
> But the Data did not change

Because it was already a data frame.


>
> When I tried
> as.data.frame(unlist(Data))
>
> The Data converted to a vector not to a data frame. Any idea ?
>
> Thank you in advance
>
> ______________________________________________
> R-help at r-project.org <javascript:;> mailing list -- To UNSUBSCRIBE
and
> more, see
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> and provide commented, minimal, self-contained, reproducible code.
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-- 
Sarah Goslee
http://www.stringpage.com
http://www.sarahgoslee.com
http://www.functionaldiversity.org

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On 15/02/2016 7:41 AM, asma.rabe at gmail.com wrote:
> Hi,
>
> I  read data from file as follows
>
> Data<-read.table("file.txt",header=T,sep="\t")
>
> mode(Data)
> list
>
> I want to convert data to data frame, I tried the following:
>
> as.data.frame(Data)
> data.frame(Data)
>
> But the Data did not change
It is already a dataframe.  Whoever told you that mode(Data) is the way 
to test for that is giving you bad advice.  (Probably the same source 
that said T always means TRUE.)

There's a function is.data.frame() that does the proper test, i.e.

inherits(Data, "data.frame")

Or you can look at class(Data).

Duncan Murdoch
>
> When I tried
> as.data.frame(unlist(Data))
>
> The Data converted to a vector not to a data frame. Any idea ?
>
> Thank you in advance
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.
>