[R] efficiently replacing values in a matrix

[Rolf Turner]

On 17/04/2008, at 9:33 AM, Charles C. Berry wrote:

	<snip>

> I'll lay odds that Matthew's 'matrix' is actually a data.frame, and  
> I'll not be surprised if the columns are factors.

	<snip>

I suspect that you're right.

***Why*** can't people distinguish between data frames and matrices?
If they were the same <expletive deleted> thing, there wouldn't be two
different terms for them, would there?

	cheers,

		Rolf Turner

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