# Options & styles for lines

    library(apexcharter)
    library(dplyr)

    # economics dataset from ggplot2
    data("economics", package = "ggplot2")
    economics <- tail(economics, 50)

    data("economics_long", package = "ggplot2")
    economics_long <- economics_long %>%
      filter(variable %in% c("pce", "pop")) %>%
      group_by(variable) %>%
      slice(tail(row_number(), 20))

## Type of line

Classic line:

    apex(data = economics, type = "line", mapping = aes(x = date, y = uempmed))

Spline curve:

    apex(data = economics, type = "line", mapping = aes(x = date, y = uempmed)) %>%
      ax_stroke(curve = "smooth")

Steps chart:

    apex(data = economics, type = "line", mapping = aes(x = date, y = uempmed)) %>%
      ax_stroke(curve = "stepline")

## Line appearance

Color line with gradient:

    apex(data = economics, type = "line", mapping = aes(x = date, y = uempmed)) %>%
      ax_fill(
        type = "gradient",
        gradient = list(
          shade = "dark",
          gradientToColors = list("#FDD835"),
          shadeIntensity = 1,
          type = "horizontal",
          opacityFrom = 1,
          opacityTo = 1,
          stops = c(0, 100, 100, 100)
        )
      )

Solid area color:

    apex(data = economics, type = "area", mapping = aes(x = date, y = uempmed)) %>%
      ax_fill(type = "solid", opacity = 1)

Line width:

    apex(data = economics, type = "line", mapping = aes(x = date, y = uempmed)) %>%
      ax_stroke(width = 1)

Dotted line

    apex(data = economics, type = "line", mapping = aes(x = date, y = uempmed)) %>%
      ax_stroke(dashArray = 6)

## Markers

Add points to line :

    apex(data = tail(economics, 20), type = "line", mapping = aes(x = date, y = uempmed)) %>%
      ax_markers(size = 6)

Add labels over points

    apex(data = tail(economics, 20), type = "line", mapping = aes(x = date, y = uempmed)) %>%
      ax_markers(size = 6) %>%
      ax_dataLabels(enabled = TRUE)

## Multiple lines

You can use vectors of parameters to custom series separately:

    apex(data = economics_long, type = "line", mapping = aes(x = date, y = value01, group = variable)) %>%
      ax_yaxis(decimalsInFloat = 2) %>%
      ax_markers(size = c(3, 6)) %>%
      ax_stroke(width = c(1, 3))

    apex(data = economics_long, type = "line", mapping = aes(x = date, y = value01, group = variable)) %>%
      ax_yaxis(decimalsInFloat = 2) %>%
      ax_stroke(dashArray = c(8, 5))