rAmCharts4-adapters: Adapters

In rAmCharts4: Interface to the JavaScript Library 'amCharts 4'

Adapters

Description

Adapters allow to have finer control of settings such as the colors of the columns of a bar chart or the colors of the points of a scatter chart.

Usage

amColorAdapterFromVector(colors)

amColorAdapterFromCuts(cuts, colors, value)

Arguments

colors	a vector of colors
cuts	a vector of cut points (sorted increasingly)
value	a mathematical expression of the variables X and Y given as JavaScript code; the simplest examples are "X" and "Y", a more elaborate example is "Math.sqrt(X**2+Y**2)" (don't forget that the power in JavaScript is '**', not '^'!); see the examples

Examples

# bar chart with individual colors ####

dat <- data.frame(
  country = c("USA", "China", "Japan", "Germany", "UK", "France"),
  visits = c(3025, 1882, 1809, 1322, 1122, 1114)
)

amBarChart(
  data = dat,
  width = "600px",
  category = "country", values = "visits",
  showValues = FALSE,
  tooltip = FALSE,
  columnStyle = amColumn(
    color = amColorAdapterFromVector(hcl.colors(6, "Viridis")),
    opacity = 0.7,
    strokeColor = amColorAdapterFromVector(hcl.colors(6, "Cividis")),
    strokeWidth = 4
  ),
  bullets = amCircle(
    color = amColorAdapterFromVector(hcl.colors(6, "Viridis")),
    opacity = 1,
    strokeColor = amColorAdapterFromVector(hcl.colors(6, "Cividis")),
    strokeWidth = 4,
    radius = 12
  ),
  alwaysShowBullets = TRUE,
  chartTitle =
    amText(text = "Visits per country", fontSize = 22, color = "orangered"),
  backgroundColor = "rgb(164,167,174)",
  xAxis = list(title = amText(text = "Country", color = "maroon")),
  yAxis = list(
    title = amText(text = "Visits", color = "maroon"),
    gridLines = amLine(color = "white", width = 1, dash = "3,3")
  ),
  yLimits = c(0, 4000),
  valueFormatter = "#,###.",
  caption = amText(text = "Year 2018", color = "red")
)


# usage example of amColorAdapterFromCuts ####

set.seed(314159)
dat <- data.frame(
  x = rnorm(200),
  y = rnorm(200)
)

amScatterChart(
  data = dat,
  width = "500px", height = "500px",
  xValue = "x", yValues = "y",
  xLimits = c(-3,3), yLimits = c(-3,3),
  draggable = FALSE,
  backgroundColor = "#30303d",
  pointsStyle = amCircle(
    color = amColorAdapterFromCuts(
      cuts = c(-2, -1, 1, 2),
      colors = c("red", "green", "blue", "green", "red"),
      value = "Y"
    ),
    opacity = 0.5,
    strokeColor = amColorAdapterFromCuts(
      cuts = c(-2, -1, 1, 2),
      colors = c("darkred", "darkgreen", "darkblue", "darkgreen", "darkred"),
      value = "Y"
    )
  ),
  xAxis = list(
    breaks = amAxisBreaks(seq(-3, 3, by=1)),
    gridLines = amLine(opacity = 0.3, width = 1)
  ),
  yAxis = list(
    breaks = amAxisBreaks(seq(-3, 3, by=1)),
    gridLines = amLine(opacity = 0.3, width = 1)
  ),
  tooltip = FALSE,
  caption = amText(text = "[font-style:italic]rAmCharts4[/]",
                   color = "yellow"),
  theme = "dark")


# other usage example of amColorAdapterFromCuts: linear gradient ####

set.seed(314159)
dat <- data.frame(
  x = rnorm(500),
  y = rnorm(500)
)

amScatterChart(
  data = dat,
  width = "500px", height = "500px",
  xValue = "x", yValues = "y",
  xLimits = c(-3,3), yLimits = c(-3,3),
  draggable = FALSE,
  backgroundColor = "#30303d",
  pointsStyle = amCircle(
    radius = 4,
    strokeWidth = 1,
    color = amColorAdapterFromCuts(
      cuts = seq(-3, 3, length.out = 121),
      colors = colorRampPalette(
        c("red","orangered","blue","white","blue","orangered","red")
      )(122),
      value = "X"
    ),
    opacity = 0.75,
    strokeColor = amColorAdapterFromCuts(
      cuts = seq(-3, 3, length.out = 121),
      colors = colorRampPalette(
        c("red","orangered","blue","white","blue","orangered","red")
      )(122),
      value = "X"
    )
  ),
  xAxis = list(
    breaks = amAxisBreaks(seq(-3, 3, by=1)),
    gridLines = amLine(opacity = 0.3, width = 1)
  ),
  yAxis = list(
    breaks = amAxisBreaks(seq(-3, 3, by=1)),
    gridLines = amLine(opacity = 0.3, width = 1)
  ),
  tooltip = FALSE,
  caption = amText(text = "[font-style:italic]rAmCharts4[/]",
                   color = "yellow"),
  theme = "dark")


# yet another usage example of amColorAdapterFromCuts: radial gradient

set.seed(314159)
dat <- data.frame(
  x = rnorm(1000),
  y = rnorm(1000)
)

amScatterChart(
  data = dat,
  width = "500px", height = "500px",
  xValue = "x", yValues = "y",
  xLimits = c(-3,3), yLimits = c(-3,3),
  draggable = FALSE,
  backgroundColor = "#30303d",
  pointsStyle = amCircle(
    radius = 4,
    strokeWidth = 1,
    color = amColorAdapterFromCuts(
      cuts = seq(0, 3, length.out = 121),
      colors = colorRampPalette(
        c("white","blue","orangered","red")
      )(122),
      value = "Math.sqrt(X**2+Y**2)"
    ),
    opacity = 0.75,
    strokeColor = amColorAdapterFromCuts(
      cuts = seq(0, 3, length.out = 121),
      colors = colorRampPalette(
        c("white","blue","orangered","red")
      )(122),
      value = "Math.sqrt(X**2+Y**2)"
    )
  ),
  xAxis = list(
    breaks = amAxisBreaks(seq(-3, 3, by=1)),
    gridLines = amLine(opacity = 0.3, width = 1)
  ),
  yAxis = list(
    breaks = amAxisBreaks(seq(-3, 3, by=1)),
    gridLines = amLine(opacity = 0.3, width = 1)
  ),
  tooltip = FALSE,
  caption = amText(text = "[font-style:italic]rAmCharts4[/]",
                   color = "yellow"),
  theme = "dark")

rAmCharts4 documentation built on Sept. 22, 2022, 5:05 p.m.