[R] indexing a vector

[Thomas Lumley]

On Mon, 7 May 2001, David White wrote:

>
> Dear R-List,
>
> How can one look up the row/column number for a given value in a matrix or
> data.frame?  For example in a matrix that contains only unique values for
> in [,1] how can I find value x in [,1] and report its row number?
>

match(x,matrix[,1])

	-thomas

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