[R] latex in ltext

[Mary Lindstrom]

Hi. I have been able to get things like

   text(9,46, expression(hat(beta) == (X^t * X)^{-1} * X^t * y))

to work in regular plots but 

   ltext(9,46, expression(hat(beta) == (X^t * X)^{-1} * X^t * y))

does not do the same in lattice (trellis) plots.  Has it not been
implemented or am I missing something?

Thanks

- Mary
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