# [R] [External] Adding a superscript 6 to a number

Duncan Murdoch murdoch@dunc@n @end|ng |rom gm@||@com
Wed Dec 30 02:16:58 CET 2020

```On 29/12/2020 4:15 p.m., Jeff Newmiller wrote:
> Why not? Is that a generalization, or specific to this case?

paste and expression are used several times in the code that was posted.
The one that causes all the trouble is

labels=paste(PNotSusp,"=\n",mylab)

where mylab is an expression, the result of

expression(paste(" ",character(x)^6))

The paste() within the expression() call is harmless; the one outside it
is disastrous.

Duncan Murdoch

>
> On December 29, 2020 7:54:22 AM PST, "Richard M. Heiberger" <rmh using temple.edu> wrote:
>> paste() is the problem.  don’t use paste with expression()
>>
>> On Tue, Dec 29, 2020 at 10:50 Sorkin, John <jsorkin using som.umaryland.edu>
>> wrote:
>>
>>> Colleagues,
>>>
>>> I would like to create a number (stored in the variable x) to the
>> number
>>> with the exponent of, i.e. the number to the sixth power. The code I
>> have
>>> tried, pasted below does not work.
>>>
>>> # create plot
>>> plot(x=0.2,y=0.2,xlim=c(0,1),ylim=c(0,1))
>>> PNotSusp=0.69
>>> # Create a string containing the base and exponent.
>>> x <- 0.95123
>>> # Convert the base to text and add the exponent of 6
>>> mylab <- expression(paste(" ",character(x)^6))
>>> # Add the text to the plot
>>> text(0.4,0.8,labels=paste(PNotSusp,"=\n",mylab))
>>>
>>> I hope someone can show me how to create the text string I need.
>>>
>>> Thank you,
>>> John
>>>
>>> John David Sorkin M.D., Ph.D.
>>> Professor of Medicine
>>> Chief, Biostatistics and Informatics
>>> University of Maryland School of Medicine Division of Gerontology and
>>> Geriatric Medicine
>>> Baltimore VA Medical Center
>>> 10 North Greene Street
>>>
>>> GRECC (BT/18/GR)
>>> Baltimore, MD 21201-1524
>>> (Phone) 410-605-7119
>>> (Fax) 410-605-7913 (Please call phone number above prior to faxing)
>>>
>>>
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>>
>> 	[[alternative HTML version deleted]]
>>
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