[R] Superscript number before letter

[David Winsemius]

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 at 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