Contents

init(xStart:xEnd:y:height:)

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

Declaration

nonisolated init<X, Y>(xStart: PlottableValue<X>, xEnd: PlottableValue<X>, y: PlottableValue<Y>, height: MarkDimension = .automatic) where X : Plottable, Y : Plottable

Parameters

  • xStart:

    The value plotted with x start.

  • xEnd:

    The value plotted with x end.

  • y:

    The value plotted with y.

  • height:

    The rectangle height. If height is not specified, then 70% of the step size will be used. If there is no step size a default height (in pts) will be used.

Discussion

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

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

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

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

[Image]

See Also

Creating a rectangle mark