Superscript out of bound and alpha symbol in Rplotly

Hi,
I am trying to insert the sigma symbol along with superscript in the title of plotly.
I tried the following code. I am trying to get the superscript inside the boundary.

Thanks

library(plotly)
plot_ly(airquality, x = ~Wind, y = ~Temp, 
                  type = 'scatter', mode = 'markers') %>% 
  layout(title="&sigma<sup>2</sup>")

Have you tried "\sigma[2]"?

More maths symbols can be found here

According to the Carson Sievert's book, this should be possible by wrapping in the TeX() function:

layout(title=TeX("\\sigma_2"))

1 Like

Thanks, @MyKo101, I have done with

layout(title =TeX("\\sigma^{2}"))

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that doesn't work either.
Thanks though