David,

That is not clear from the original request.  The request was for {}^18*O

It wasn't for delta^18
Therefore I put the space there to be sure that the 18 was seen as
pre-superscript of O,
not as a post-superscript of delta.  I probably should also have used ~ as

plot(1:10, xlab=expression(delta~{}^18*"O" * " VSMOW [‰]"))

The original was unclear on [], since it was inside half a set of quotation
marks.

Rich



On Wed, May 4, 2011 at 11:01 AM, David Winsemius <dwinsemius@comcast.net>wrote:

>
> On May 4, 2011, at 7:28 AM, Richard M. Heiberger wrote:
>
> Dos this do what you want?
>>
>> plot(1:10, xlab=expression(delta*{}^18*"O" * " VSMOW [‰]"))
>>
>> The specific is to put an empty item there to hold the superscript.
>>
>
> I do not think that is necessary:
>
>
> plot(1:10, xlab=expression(delta^18*O~VSMOW["‰"]))
>
> (I wasn't sure if the [.] operation was supposed to be a subscript.)
>
> I generally avoid spaces in plotmath expressions and use tildes "~" to
> accomplish any needed spaces. The asterisk "*" is the non-spacing separator
> between elements.
>
>
>
>
>> On Wed, May 4, 2011 at 9:37 AM, Janhal <janine.halder@unil.ch> wrote:
>>
>> Salut,
>>> I have been struggling to superscript the 18 before the O without ^
>>> visible
>>> and found only help to superscript numbers after the letter. Thanks to
>>> anyone who can help.
>>> xlab=expression(delta*18O VSMOW [‰]")
>>> Cheers,
>>> Janine
>>>
>>> --
>>>
>>
> David Winsemius, MD
> Heritage Laboratories
> West Hartford, CT
>
>

	[[alternative HTML version deleted]]

