On 04.08.2012 12:18, Ivette wrote:> http://r.789695.n4.nabble.com/file/n4639158/elgas2.csv elgas2.csv
> http://r.789695.n4.nabble.com/file/n4639158/histogramselgas.R
> histogramselgas.R
>
> Hello,
>
> I want to plot 9 histograms, and I prepare the data for this operation with
> the usual command,
> sapply(x, is.numeric), then I get a confirmation that all data are numeric.
> Strangely, when I want to plot the histograms I get the error message:
> 'x' must be numeric. My 'x' is already numeric and I have
no idea what's
> wrong.
> Could somebody tell me where the error is? I attach my .csv data and my R
> code.
You diverse x are data.frames rather than numeric vectors, just the
columns of your data.frames are numeric.
Hence use, e.g., x1[,1] do access the first column of x1 etc.
Uwe Ligges
>
> Thank you.
>
>
>
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