R help - May 2016 - row names, coulmn names

Hello dear R helpers,

Is it possible to have more than 1 row for column names in data.frame,
array, tbl_df? I would like to have column numbers in the first row, string
names in the second row, physical unit in third row.
How would I do it?

Derek

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I think what you ask isn't ideal.Each column in a dataframe should be the
same data type. While column names are stored in the first row when the df
is exported to CSV, they are not stored as columns in the data frame.
Instead the column names are stored as a separate attribute of the df. This
is why you need to use names(df) to access them, not df[1,]. I don't have
access to R right now, but I think ?attributes or ??"attributes"
should
point you in the correct direction.

On Sun, May 1, 2016, 11:11 AM Jan Kacaba <jan.kacaba at gmail.com> wrote:
> Hello dear R helpers,
>
> Is it possible to have more than 1 row for column names in data.frame,
> array, tbl_df? I would like to have column numbers in the first row, string
> names in the second row, physical unit in third row.
> How would I do it?
>
> Derek
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> 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.
>
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> On May 1, 2016, at 11:09 AM, Jan Kacaba <jan.kacaba at gmail.com>
wrote:
> 
> Hello dear R helpers,
> 
> Is it possible to have more than 1 row for column names in data.frame,
> array, tbl_df? I would like to have column numbers in the first row, string
> names in the second row, physical unit in third row.
It's possible to embed "\n" in names but whether that will deliver
desired results with plotting and printing functions may be another matter. You
would always  need to quote names, even when using "$".

> How would I do it?
> 
> Derek
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> 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.
David Winsemius
Alameda, CA, USA