R Highcharter specify continuous x and y axis

Question

I am a bit confused with use of highcharter hc_add_series function.

I am trying to create a plot where I need to specify both x and y axis, where x axis are continuous. I have a data-frame, for example:

df_plot <- cbind(
  seq(0, 1, by = 0.1),
  sample(seq(from = 100, to = 300, by = 10), size = 11, replace = TRUE),
  sample(seq(from = 1, to = 100, by = 9), size = 11, replace = TRUE),
  sample(seq(from = 50, to = 60, by = 2), size = 11, replace = TRUE),
  sample(seq(from = 100, to = 130, by = 1), size = 1, replace = TRUE)
) %>% 
  as.data.frame()

names(df_plot) <- c("x", "a", "b", "c", "d")

I saw this example that works

highchart() %>%
    hc_add_series(data = purrr::map(4:8, function(x) list(x, x)), color = "blue")

So i tried:

df_plot1 <- Map(cbind, split.default(df_plot[-1], names(df_plot)[-1]), x=df_plot[1])

highchart() %>%
  hc_add_series(data = df_plot1[[1]]) %>%
  hc_add_series(data = df_plot1[[2]], yAxis = 1) %>%
 hc_yAxis_multiples(
    list(lineWidth = 3, lineColor='#7cb5ec', title=list(text="First y-axis")),
    list(lineWidth = 3, lineColor="#434348", title=list(text="Second y-axis")))

However, I am getting "No data to display" on the plot, so I obviously went wrong somewhere.

Also, I cannot use hchart function, as I need have multiple y axis

Answer 1

After reading docs about split.default it Divide into Groups and Reassemble, however you need to access the variable you want to plot, e.g. df_plot1[[1]$a, like so:

library(highcharter)
df_plot <- cbind(
  seq(0, 1, by = 0.1),
  sample(seq(from = 100, to = 300, by = 10), size = 11, replace = TRUE),
  sample(seq(from = 1, to = 100, by = 9), size = 11, replace = TRUE),
  sample(seq(from = 50, to = 60, by = 2), size = 11, replace = TRUE),
  sample(seq(from = 100, to = 130, by = 1), size = 1, replace = TRUE)
) %>% as.data.frame()

names(df_plot) <- c("x", "a", "b", "c", "d")
df_plot1 <- Map(cbind, split.default(df_plot[-1], names(df_plot)[-1]), x=df_plot[1])

highchart() %>%
  hc_xAxis(categories = df_plot1[[1]]$x) %>%
  hc_add_series(data = df_plot1[[1]]$a) %>%
  hc_add_series(data = df_plot1[[2]]$b, yAxis = 1) %>%
  hc_yAxis_multiples(
    list(lineWidth = 3, lineColor='#7cb5ec', title=list(text="First y-axis")),
    list(lineWidth = 3, lineColor="#434348", title=list(text="Second y-axis")))