dyRibbon: dyRibbon plugin adds a horizontal band of colors that runs...

In dygraphs: Interface to 'Dygraphs' Interactive Time Series Charting Library

Description

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

## Not run: 
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)

## End(Not run)

dygraphs documentation built on May 2, 2019, 3:34 p.m.