Interactive chord diagram with R

The chorddiag package allows to build interactive chord diagrams with R. It expects a square matrix as input, providing flow strength between each pair of nodes that will be displayed around the circle.

Once the data formated properly, the chorddiag() function will automatically build the chart for you.

Note: The chorddiag package is a project by Mattflor and this example comes from its documentation.

# Load package
# devtools::install_github("mattflor/chorddiag")
library(chorddiag)

# Create dummy data
m <- matrix(c(11975,  5871, 8916, 2868,
              1951, 10048, 2060, 6171,
              8010, 16145, 8090, 8045,
              1013,   990,  940, 6907),
            byrow = TRUE,
            nrow = 4, ncol = 4)

# A vector of 4 colors for 4 groups
haircolors <- c("black", "blonde", "brown", "red")
dimnames(m) <- list(have = haircolors,
                    prefer = haircolors)
groupColors <- c("#000000", "#FFDD89", "#957244", "#F26223")

# Build the chord diagram:
p <- chorddiag(m, groupColors = groupColors, groupnamePadding = 20)
p

# save the widget
# library(htmlwidgets)
# saveWidget(p, file=paste0( getwd(), "/HtmlWidget/chord_interactive.html"))

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