[R] sort data frame columns according to a list

[David Winsemius]

So your second dataframe, say DF2, has sample IDs in one of its  
columns, say "colnames", (or are they in in the names?)

( Examples and output of str() are requested to avoid exactly such  
ambiguity.)

If it is the former, then;

DF1[ , DF2colnames ]   # could do it.

-- 
David Winsemius

On Mar 16, 2009, at 4:41 PM, Jie Zhang wrote:

> HI,
>
> I have searched the R-help achive, trying to find a way to sort  
> columns in a data frame according to a specific list, but not be  
> able to find a general way to do it.
>
> My data frame contains columns, with each one named from a sample  
> ID, and each sample was measured in a specific time, generating one  
> column of data, now I would like to sort the columns according to  
> the time course, so I have the second data frame containing sample  
> IDs with time point, but how should I do the sorting?
>
> Thanks a lot!
>
> Jie
>
>
>
> 	[[alternative HTML version deleted]]
>
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David Winsemius, MD
Heritage Laboratories
West Hartford, CT