ErrorBars

Plotting means and error ranges.

There are several ways to show error ranges on a plot. Among them are

errorBars
crossBars
lineRanges
pointRanges

// This example was found at: www.cookbook-r.com/Graphs/Plotting_means_and_error_bars_(ggplot2)
val supp by columnOf("OJ", "OJ", "OJ", "VC", "VC", "VC")
val dose by columnOf(0.5, 1.0, 2.0, 0.5, 1.0, 2.0)
val length by columnOf(13.23, 22.70, 26.06, 7.98, 16.77, 26.14)
val len_min by columnOf(11.83, 21.2, 24.50, 4.24, 15.26, 23.35)
val len_max by columnOf(15.63, 24.9, 27.11, 10.72, 19.28, 28.93)
val dataset = dataFrameOf(supp, dose, length, len_min, len_max)

Error Bars with lines and points

plot(dataset) {
    x(dose)
    errorBars {
        yMin(len_min)
        yMax(len_max)
        borderLine.color(supp)

        width = .1
    }
    line {
        y(length)
        color(supp)
    }
    points {
        y(length)
        color(supp)
    }
}

val posD = Position.dodge(0.1)
plot(dataset) {
    x(dose)

    errorBars {
        yMin(len_min)
        yMax(len_max)
        borderLine.color(supp)

        width = .1
        position = posD
    }

    line {
        y(length)
        color(supp)

        position = posD
    }

    points {
        y(length)
        color(supp)

        position = posD
    }
}

plot(dataset) {
    x(dose)
    groupBy(supp) {
        errorBars {
            yMin(len_min)
            yMax(len_max)

            borderLine.color = Color.BLACK
            width = .1
            position = posD
        }
    }


    line {
        y(length)
        color(supp)

        position = posD
    }

    points {
        y(length)
        color(supp)

        size = 5.0
        position = posD
    }
}

val customColorScale = Scale.categorical<Color, String>(
    range = listOf(Color.ORANGE, Color.named("dark_green"))
)

plot(dataset) {
    x(dose)

    groupBy(supp) {
        errorBars {
            yMin(len_min)
            yMax(len_max)

            borderLine.color = Color.BLACK
            width = .1
            position = posD
        }
    }

    line {
        y(length)
        color(supp) { scale = customColorScale }

        position = posD
    }

    points {
        y(length)
        color(supp) { scale = customColorScale }

        symbol = Symbol.CIRCLE_FILLED
        size = 5.0
        fillColor = Color.WHITE
        position = posD
    }

    layout {
        title = "The Effect of Vitamin C on Tooth Growth in Guinea Pigs"
        size = 700 to 400
        xAxisLabel = "Dose (mg)"
        yAxisLabel = "Tooth length (mm)"

        style {
            legend {
                justification(1.0, 0.0)
                position(1.0, 0.0)
            }
        }
    }

}

Error Bars on bar plot

plot(dataset) {
    x(dose)

    bars {
        y(length)
        fillColor(supp) { scale = customColorScale }

        borderLine.color = Color.BLACK
        position = Position.dodge()
    }

    groupBy(supp) {
        errorBars {
            yMin(len_min)
            yMax(len_max)

            borderLine.color = Color.BLACK
            width = .1
            position = Position.dodge(0.9)
        }
    }


    layout {
        size = 700 to 400
        xAxisLabel = "Dose (mg)"
        yAxisLabel = "Tooth length (mm)"

        style {
            legend {
                justification(0.0, 1.0)
                position(0.0, 1.0)
            }
        }
    }
}

Crossbars

plot(dataset) {
    x(dose)

    crossBars {
        yMin(len_min)
        yMax(len_max)
        y(length)
        borderLine.color(supp) { scale = customColorScale }

        fatten = 5.0
        position = Position.dodge(0.95)
    }

    layout {
        size = 700 to 400
        xAxisLabel = "Dose (mg)"
        yAxisLabel = "Tooth length (mm)"
    }
}

LineRanges

plot(dataset) {
    x(dose)

    lineRanges {
        yMin(len_min)
        yMax(len_max)
        borderLine.color(supp) { scale = customColorScale }

        position = posD
    }

    line {
        y(length)
        color(supp) { scale = customColorScale }

        position = posD
    }

    layout {
        size = 700 to 400
        xAxisLabel = "Dose (mg)"
        yAxisLabel = "Tooth length (mm)"
    }
}

PointRanges

plot(dataset) {
    x(dose)

    pointRanges {
        y(length)
        yMin(len_min)
        yMax(len_max)
        color(supp) { scale = customColorScale }

        position = posD
    }

    line {
        y(length)
        color(supp) { scale = customColorScale }

        position = posD
    }

    layout {
        size = 700 to 400
        xAxisLabel = "Dose (mg)"
        yAxisLabel = "Tooth length (mm)"
    }
}

plot(dataset) {
    x(dose)

    line {
        y(length)
        color(supp) { scale = customColorScale }

        position = posD
    }

    pointRanges {
        y(length)
        yMin(len_min)
        yMax(len_max)

        innerPoint {
            fatten = 1.0
            symbol = Symbol.DIAMOND_FILLED
            fillColor(supp) { scale = customColorScale }
        }

        size = 5.0
        color = Color.rgb(230, 230, 230)
        position = posD
    }

    layout {
        size = 700 to 400
        xAxisLabel = "Dose (mg)"
        yAxisLabel = "Tooth length (mm)"
    }
}

Last modified: 05 February 2024