Hi Rolf,
This is not addressing your implementation, but reformulates the goal.
Specifically, the covariance matrix is normally written as \Sigma (not
\sigma^2).
So to specify the upper left element you would write (in Latex)
\Sigma_{11}.
No superscript (so no problem!)
HTH,
Eric
On Wed, Dec 9, 2020 at 10:17 AM Dr Eberhard W Lisse <e...@lisse.na> wrote:
> They let you guys go to the pup again? :-)-O
>
> el
>
> On 09/12/2020 10:06, Rolf Turner wrote:
> [...]
> > Is there any way to achieve, with plotmath, an effect like unto that
> > produced by the LaTeX expression $\sigma^2_{11}$? Or should I just
> > give up and go to the pub? :-)
> [...]
> --
> Dr. Eberhard W. Lisse \ / Obstetrician & Gynaecologist
> e...@lisse.na / * | Telephone: +264 81 124 6733 (cell)
> PO Box 8421 Bachbrecht \ / If this email is signed with GPG/PGP
> 10007, Namibia ;____/ Sect 20 of Act No. 4 of 2019 may apply
>
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