[R] combine all data frame columns into a vector.

Bert Gunter gunter.berton at gene.com
Mon Aug 12 22:34:32 CEST 2013


Sohail:

1. Are they character or factor?

2. ?unlist
> unique(unlist(yourframe))

-- Bert

On Mon, Aug 12, 2013 at 1:23 PM, Khan, Sohail <SKhan30 at nshs.edu> wrote:
> Dear All,
>
> Could anyone suggest a quick way to combine all columns in a data frame into a vector?
> For example, I have a data frame of 205 columns with character data types, many data values are repeated in all the columns.  Actually, I would like to retrieve all the unique values from this data set.  My strategy is to put all column value into a vector and then select unique from that vector.
>
> I would appreciate a more efficient method.
> Thanks.
> -Sohail
>
>
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-- 

Bert Gunter
Genentech Nonclinical Biostatistics

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