Dear Rafael,
Try the following which seems to be close to what you asked for:

plot(1, ylab = expression( Delta ~ hat(y) [t] ) )


HTH,

Jorge



On Mon, Jul 13, 2009 at 10:56 AM, Rafael Moral
<rafa_moral2004@yahoo.com.br>wrote:

> Dear useRs,
>
> I want to put a math expression in the ylab in my plot which should be a
> Delta and a 'y' with a trace and a hat above it and a 't' as subscription.
> How could I manage to do it?
>
> Thanks in advance,
> Regards,
> Rafael.
>
>
>
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