[R] Convert list to data frame

Duncan Murdoch murdoch.duncan at gmail.com
Mon Feb 15 20:12:20 CET 2016

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
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