I'm using Highcharts in R, and I want to format the number in the tooltip as a currency without decimal spaces. Right now, numbers appear like this: 34 537 987.21. I want that number to look like this: $34,537,987. Or, better yet, like this: $34M.
Here's a sample of my code:
highchart() %>%
hc_add_series(df,
type = 'spline',
hcaes(x = year, y = data)
) %>%
hc_add_series(df,
type = 'spline',
hcaes(x = year, y = other_data)
) %>%
hc_plotOptions(series = list(marker = list(enabled = TRUE,
hover = TRUE,
symbol = 'circle'))
) %>%
hc_tooltip(
shared = TRUE,
crosshairs = TRUE
)