Thank you very much for the detailed explanations, and sorry for being vague
in my question.

"atop" is what I needed :)

Sebastien


On Thu, Aug 25, 2011 at 11:59 AM, David Winsemius <dwinsemius@comcast.net>wrote:

>
> On Aug 25, 2011, at 11:23 AM, Sébastien Vigneau wrote:
>
>  Hi,
>>
>> I would like to add a two-lines label consisting of:
>> "Delta word1\n
>> word2"
>> (with Delta being the actual greek letter).
>>
>
> But you are not saying how word1 and word2 are supposed to be positioned
> relative to each other and to Delta.
>
>
>
>> However, when I try "expression(paste(Delta,"**word1\nword2"))", I obtain
>> the
>> following display:
>> "word1\n
>> Delta word2".
>>
>> Do you have any idea on how to obtain the desired display?
>>
>
> \n does not get interpreted in plotmath expressions [as the help(plotmath)
> page states explicitly], but as your example shows [to my complete surprise]
> if you have then inside text they will get interpreted . Take a look at
> atop() and over().
>
> Perhaps:
>
> plot(1,1,main=expression(over(**Delta~word1, word2)))
>
> If you don't mean the ratio of change in word1 per word2, then this also
> gives another possible answer to your vague question.
>
> expression(atop(Delta~word1, word2))
>
> and yet a third:
>
> plot(1,1,main=expression(**Delta~over(word1, word2)))
>
> By the way the paste is entirely unneeded there. Using * and ~ as
> connectors helps keep these expression more readable. Comma then separate
> arguments for "important" plotmath functions.
>
> --
>
> David Winsemius, MD
> West Hartford, CT
>
>

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