Tiles with Color by Category

val cities = listOf("Yerevan", "Berlin", "Amsterdam", "Paphos")
val types = listOf("A", "B", "C")
val random = kotlin.random.Random(42)
val year22 = List(4) { types.random(random) }
val year23 = List(4) { types.random(random) }
val year24 = List(4) { types.random(random) }

val dataset = dataFrameOf(
    "city" to cities,
    "2022" to year22,
    "2023" to year23,
    "2024" to year24
).gather("2022", "2023", "2024").into("year", "value")

plot(dataset) {
    tiles {
        x("city")
        y("year") {
            scale = categorical()
            axis.breaks(format = "d")
        }
        width = 0.5
        height = 0.9
        fillColor("value") {
            legend.breaks(types)
        }
    }
}

val types = listOf("A", "B", "C")
val cities = listOf("Yerevan", "Berlin", "Amsterdam", "Paphos")
val years = listOf(2022, 2023, 2024)
val random = kotlin.random.Random(42)
val tripples = cities.flatMap { city ->
    years.map { year -> (city to year) to types.random(random) }
}

val (cityToYear, value) = tripples.unzip()
val (city, year) = cityToYear.unzip()

plot {
    tiles {
        x(city)
        y(year) {
            scale = categorical()
            axis.breaks(format = "d")
        }
        width = 0.5
        height = 0.9
        fillColor(value) {
            legend.breaks(types)
        }
    }
}