dyRibbon plugin adds a horizontal band of colors that runs through the chart. It can be useful to visualize categorical variables (http://en.wikipedia.org/wiki/Categorical_variable) that change over time (along the x-axis).

dyRibbon plugin adds a horizontal band of colors that runs through the chart. It can be useful to visualize categorical variables (http://en.wikipedia.org/wiki/Categorical_variable) that change over time (along the x-axis).

Usage

dyRibbon(
  dygraph,
  data = NULL,
  palette = NULL,
  parser = NULL,
  top = 1,
  bottom = 0
)

Arguments

dygraph

Dygraph to add plugin to

data

Vector of numeric values in the range from 0 to 1

palette

Vector with colors palette

parser

JavaScrip function (function (data, dygraph)) returning the array of numeric values. Parser is used if no data was provided

top

Vertical position of the top edge of ribbon relative to chart height.

bottom

Vertical position of the bottom edge of ribbon relative to chart height.

Examples

if (FALSE) { # \dontrun{
library(quantmod)

getSymbols("SPY", from = "2016-12-01", auto.assign = TRUE)

difference <- SPY[, "SPY.Open"] - SPY[, "SPY.Close"]
decreasing <- which(difference < 0)
increasing <- which(difference > 0)

dyData <- SPY[, "SPY.Close"]

ribbonData <- rep(0, nrow(dyData))
ribbonData[decreasing] <- 0.5
ribbonData[increasing] <- 1

dygraph(dyData) %>%
  dyRibbon(data = ribbonData, top = 0.1, bottom = 0.02)
} # }