On 9/02/2009, at 4:40 PM, bill.venab...@csiro.au wrote:
Store your 'matrix' as a data frame.
Surely it's a data frame already, since ``school'' is character or
factor,
and ``value'' is (must be?) numeric.
People have this unfortunate predilection to refer to data frames as
matrices, and this messes them, and everybody else, up.
cheers,
Rolf
<snip>
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