[R] how to skip a numeric column for averaging other columns?

[John Kane]

log.raw.data <- log(raw.data[,2:10]) I think but I don't understand the   "Data has the first row for variable name"  comment

--- On Wed, 7/29/09, sandsky <realstone at hotmail.com> wrote:

> From: sandsky <realstone at hotmail.com>
> Subject: [R]  how to skip a numeric column for averaging other columns?
> To: r-help at r-project.org
> Received: Wednesday, July 29, 2009, 3:01 PM
> 
> Data has the first row for variable name and the first
> column for sample
> name. I want to take "Log" for all data, but how to compute
> without the
> first column for sample name.
> 
> That is, 
> 
> column 1: sample ID
> column 2-10: data
> 
> I want to find an average on each column (2-10)
> 
> > log.raw_data=log(raw_data,base=2)
> Error in Math.data.frame(list(sample_id = c(1L, 2L, 3L, 4L,
> 5L, 6L, 7L,  : 
>   non-numeric variable in data frame: sample_id
> 
> Thank you in advance,
> 
> Jin
> -- 
> View this message in context: http://www.nabble.com/how-to-skip-a-numeric-column-for-averaging-other-columns--tp24723210p24723210.html
> Sent from the R help mailing list archive at Nabble.com.
> 
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