Writing the symbol degrees celsius in axis titles with R/plotly

Question

I'm trying to write the symbol degrees celsius with R/Plotly in one of my titles. It works when I just use a simple plot a below:

# Working code
library(latex2exp)
set.seed(1)  
betas <- rnorm(1000)
hist(betas, main = TeX("Temperature (^0C)"))

However, when I try to run the code through plotly, I get the following error: "unimplemented type 'expression' in 'HashTableSetup'".

#Initialise the plot
p <- plot_ly()

#Add axis names
#Font
f <- list(
  family = "Courier New, monospace",
  size = 18,
  color = "#7f7f7f")

#X axis name
x <- list(
  title = "x Axis",
  titlefont = f)


#Y Axis name
y <- list(
  title =  TeX("Temperature (^0C)"),
  titlefont = f)

#Add layout
p <- p %>%
  layout(xaxis = x, yaxis= y)

p

Any ideas?

Answer 1

Try,

title =  "Temperature (\u00B0C)"