Contents

init(xStart:xEnd:yStart:yEnd:)

Creates a rectangle mark with an x interval encoding and a fixed y interval.

Declaration

nonisolated init<X>(xStart: PlottableValue<X>, xEnd: PlottableValue<X>, yStart: CGFloat? = nil, yEnd: CGFloat? = nil) where X : Plottable

Discussion

  • xStart: The value plotted with x start.

  • xEnd: The value plotted with x end.

  • yStart: The y end position. If yStart is nil then the rectangle will start at the leading edge of the plotting area.

  • yEnd: The y end position. If yEnd is nil then the rectangle will end at the trailing edge of the plotting area.

Discussion

Use this initializer to map the x start and x end to a rectangle for each data element. Optionally, specify the yStart or yEnd position of the rectangles.

The example below omits the optional y and height fields and uses a number scale starting at (0,0) and ending at (6,6). The rectangle has the coordinates: (2,0), (2,6), (4,6), (4,0).

Chart(data) {
    RectangleMark(
        xStart: .value("Rect xStart", 2),
        xEnd: .value("Rect xEnd", 4)
    )
    .opacity(0.2)

    PointMark(
        x: .value("X", $0.x),
        y: .value("Y", $0.y)
    )
}

[Image]

See Also

Creating a rectangle mark