read.table produces a data.frame (a special list) even when you have only
one column.
Try y<-as.numeric(x[[1]])

On Wed, Aug 19, 2009 at 3:59 PM, Bogdan Tanasa <tanasa@gmail.com> wrote:

> Hi, and my apologies for the following very naive question : I would like
> to
> read a column of numbers in R and plot a histogram.
>
> eg :
>
> x<-read.table("txSTART");
> y<-as.numeric(x);
>
> and I do obtain the error : Error: (list) object cannot be coerced to type
> 'double'. Please could you let me know the way to fix it.
>
> thanks,
>
> bogdan
> <r-help@r-project.org>
>
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>
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>



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