Legend and Axis

val mpgDf =
    DataFrame.readCSV("https://raw.githubusercontent.com/JetBrains/lets-plot-kotlin/master/docs/examples/data/mpg.csv")
mpgDf.head()

untitled	manufacturer	model	displ	year	cyl	trans	drv	cty	hwy	fl	class
1	audi	a4	18	1999	4	auto\(l5\)	f	18	29	p	compact
2	audi	a4	18	1999	4	manual\(m5\)	f	21	29	p	compact
3	audi	a4	2	2008	4	manual\(m6\)	f	20	31	p	compact
4	audi	a4	2	2008	4	auto\(av\)	f	21	30	p	compact
5	audi	a4	28	1999	6	auto\(l5\)	f	16	26	p	compact

mpgDf.plot {
    points {
        x(displ)
        y(hwy)
        color(manufacturer)
        size = 5.0
    }
    layout.size = 600 to 250
}

mpgDf.plot {
    points {
        x(displ)
        y(hwy)
        color(manufacturer) {
            legend.type = LegendType.DiscreteLegend(nCol = 2)
        }
        size = 5.0
    }
    layout {
        title = "Two columns legend"
        size = 600 to 250
    }
}

mpgDf.plot {
    points {
        x(displ)
        y(hwy)
        color(manufacturer) {
            legend.type = LegendType.DiscreteLegend(nCol = 2, byRow = true)
        }
        size = 5.0
    }
    layout {
        title = "Two columns legend filled by rows"
        size = 600 to 250
    }
}

mpgDf.plot {
    points {
        x(displ)
        y(hwy)
        color(manufacturer) {
            legend.type = LegendType.DiscreteLegend(nRow = 5)
        }
        size = 5.0
    }
    layout {
        title = "Five rows legend and below"
        size = 700 to 400
        style {
            axis.title { blank = true }
            legend.position = LegendPosition.Bottom
        }
    }
}

mpgDf.plot {
    x(displ)
    y(hwy)
    points {
        size = 5.0
        color(cty)
        symbol(drv)
    }
    layout.size = 700 to 350
}

mpgDf.plot {
    x(displ)
    y(hwy)
    points {
        size = 5.0
        color(cty)
        symbol(drv)
    }
    layout {
        size = 700 to 350
        style {
            legend {
                justification(1.0, 1.0)
                position(1.0, 1.0)
                direction = LegendDirection.HORIZONTAL
            }
        }
    }
}

mpgDf.plot {
    x(displ)
    y(hwy)
    points {
        size = 5.0
        color(cty) {
            scale = continuous(range = Color.named("dark_blue")..Color.named("light_blue"))
            legend {
                name = "City MPG"
                type = LegendType.ColorBar(barHeight = 10.0, barWidth = 300.0)
            }
        }
        symbol(drv) {
            legend {
                name = "Drive-train"
                breaksLabeled('f' to "front", 'r' to "rear", '4' to "4X4")
            }
        }
    }
    layout {
        size = 700 to 350
        style {
            yAxis.line { blank = true }
            legend {
                justification(1.0, 1.0)
                position(1.0, 1.0)
                direction = LegendDirection.HORIZONTAL
            }
        }
        xAxisLabel = "Engine displacement (L)"
        yAxisLabel = "Highway MPG"
    }
}

Legend and Axis﻿

See also

Legend and Axis