Heatmap Settings

val df = DataFrame.readCSV(
    fileOrUrl = "https://raw.githubusercontent.com/Kotlin/dataframe/master/examples/idea-examples/titanic/src/main/resources/titanic.csv",
    delimiter = ';', parserOptions = ParserOptions(locale = java.util.Locale.FRENCH)
)

df.plot {
    heatmap("embarked", "pclass") {
        borderLine {
            width = 0.8
            color = Color.BLACK
        }
        fillColor(Stat.count) {
            scale = continuous(Color.WHITE..Color.RED)
            legend.name = "number of\n passangers"
        }
    }
    y.axis.breaks(df["pclass"].distinct().toList(), format = "d")
}