Points

Scatter and bubble charts use numeric coordinates instead of named categories. Each series contains its own list of points, and every series shares the same two axes.

Each group can contain different coordinates while sharing the same scales.

Scatter series

Each scatter point requires finite x and y values.

$model = Chart::scatter()
    ->title('Customer distribution')
    ->axes('Age', 'Annual spend')
    ->series('New', [
        ['x' => 22, 'y' => 28],
        ['x' => 31, 'y' => 41],
        ['x' => 45, 'y' => 58],
    ])
    ->series('Returning', [
        ['x' => 25, 'y' => 82],
        ['x' => 43, 'y' => 55],
    ])
    ->build();

Unlike category series, point series do not need matching coordinates or the same number of points.

Bubble series

Bubble points also require a positive size. The renderer maps the square root of that value to the radius, so the visible area remains proportional to the supplied size.

$model = Chart::bubble()
    ->title('Market opportunities')
    ->axes('Growth %', 'Margin %')
    ->series('Markets', [
        ['x' => 18, 'y' => 62, 'size' => 420],
        ['x' => 28, 'y' => 54, 'size' => 270],
        ['x' => 48, 'y' => 38, 'size' => 120],
    ])
    ->build();

The largest size in the complete chart establishes the bubble scale. Point order does not define a line or imply continuity.

SVG data

With SvgRenderOptions(dataAttributes: true), every rendered point exposes data-series, data-x, data-y, and data-size. These attributes support inspection or progressive enhancement without making hover the only way to read essential chart information.