latex2exp not supported

[danton267]

library(plotly)
library(latex2exp)
library(ggplot2)

p <- qplot(1, "A")+
     ylab(TeX("Formula: $\\frac{2hc^2}{\\lambda^\\beta}$"))+
     xlab(TeX("$\\alpha$"))

ggplotly(p)

yields following error

Error in unique.default(x) : unimplemented type 'expression' in 'duplicated'

[cpsievert]

Whoops, #2030 doesn't actually fix this problem, so I've reverted it in 15807cf.

The problem derives from the fact that by doing library(latex2exp) after library(plotly) will make TeX() resolve to latex2exp::TeX(), not plotly::TeX()

> library(plotly)
> library(latex2exp)

Attaching package: ‘latex2exp’

The following object is masked from ‘package:plotly’:

    TeX
> p <- qplot(1, "A") +
+   ylab(TeX("Formula: $\\frac{2hc^2}{\\lambda^\\beta}$")) +
+   xlab(TeX("$\\alpha$"))
> ggplotly(p)
Error in unique.default(x) : 
  unimplemented type 'expression' in 'duplicated'

So, the actual fix must come from the user code by changing TeX() to plotly::TeX()