How to set dataLabel Format and axis label angle in R highcharter package

Question

I am experimenting with R highcharter package to create a bar chart function. the code is as below. I request help in 1-How to change the format of the dataLabels to percentage ? 2-How to set X-axis label display angle. I want to set it to 45 degrees

hcbar_categorycount_vertical <- function(data=x,var=y){
df <- data.frame(prop.table(table(data[var])))
names(df) <- c(var,'Proportion')
df$Proportion <- round(df$Proportion*100,2)
df <- df%>% arrange(-Proportion)
df[,1] <- as.character(df[,1])
df[,1] <- factor(df[,1], levels = df[,1])
df$Cumulative <- round(cumsum(df$Proportion),2)

highchart(debug = TRUE) %>%
hc_xAxis(categories=df[[1]]) %>%
hc_yAxis(labels = list(format = "{value}%"), max = 100) %>%
hc_add_series(name=var,data=df$Proportion,type = "column",dataLabels =       list(enabled = TRUE, format='{point.label}%'))
}

I am not sure what should be the syntax of "format" within dataLabel property list.The above code does not seem to work. I already referred to the highcharter vignette and this site : http://jkunst.com/highcharter/highcharts-api.html#hc_xaxis-and-hc_yaxis

But could not find an answer. Thanks for the help in advance.

Answer 1

@jeganathan-velu,

1) Try changing the '{point.label}%'by '{point.y}%'

2) See the highcharts example. You need to add to the hc_xAxis the argument labels = list(rotation = 90)

highcharter package is just the wrapper of highcharts so you can check all the examples and the well documented API from highcharts. Replicating highcharts demos