[R] indexing a vector

Thomas Lumley tlumley at u.washington.edu
Mon May 7 20:38:53 CEST 2001

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?



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