Graflume · Alpha

Vector field · Chart-specific features

Encode direction and magnitude at each coordinate with arrow angle and length. These tabs come from Graflume's public catalog. Every mode owns runnable data, options, a Quick API, and source-backed feature claims.

Chart family · Specialized families

Vector field

Encode direction and magnitude at each coordinate with arrow angle and length.

Quick API
vectorField()
Browser snapshot
graflume/complete
mark
vector
Presets
2

Chart-specific features

Every executable mode in this family

These tabs come from Graflume's public catalog. Every mode owns runnable data, options, a Quick API, and source-backed feature claims.

Vector field chart

Vector field chart uses runnable data and options to demonstrate direction and magnitude arrows; magnitude size and width.

StatusLoading

  • vector
  • direction and magnitude arrows
  • magnitude size and width
  • normalization and sampled grid
Graflume.vector() Canvas 2D
Control help

Zoom and pan inspect the rendered surface without changing data axes or values. When playback controls are available, they move through real steps in the order each unique value first appears in the source data.

Use Tab to reach a control and Enter or Space to activate it. With the chart focused, use plus and minus to zoom and arrow keys to pan.

Auto placement compares perimeter candidates and avoids the plot, legend, and other callouts when possible. Explicit placement is preserved with only necessary safety correction. Callout text wraps safely inside the bubble. Long unbroken tokens are visually shortened within the line budget, while the complete source text remains available to assistive technology.

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Browser API · Portable schema

Browser API

Graflume.vector()

const data = [
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    "magnitude": 2.228,
    "value": 1.44,
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  {
    "direction": 322.357,
    "high": -1.22,
    "magnitude": 1.998,
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    "high": 2.102,
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    "y": -1
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    "y": -1
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  },
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  },
  {
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  {
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    "x": 0,
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  {
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  },
  {
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  {
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  {
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  },
  {
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  },
  {
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  },
  {
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  },
  {
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    "high": 0.763,
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    "y": 3
  },
  {
    "direction": 143.11700000000002,
    "high": 1.243,
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    "x": 3,
    "y": 3
  },
  {
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    "high": 1.723,
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    "value": -1.579,
    "x": 4,
    "y": 3
  }
];

const options = {
  "accessibility": {
    "description": "Zoom and pan inspect the rendered surface without changing data axes or values. When playback controls are available, they move through real steps in the order each unique value first appears in the source data.",
    "label": "Vector field example"
  },
  "axes": {
    "x": {
      "format": {
        "fractionDigits": 0,
        "suffix": " km",
        "type": "number"
      },
      "ticks": {
        "count": 5
      },
      "title": {
        "text": "East–west distance"
      }
    },
    "y": {
      "format": {
        "fractionDigits": 0,
        "suffix": " km",
        "type": "number"
      },
      "ticks": {
        "count": 5
      },
      "title": {
        "text": "North–south distance"
      }
    }
  },
  "height": 620,
  "interaction": {
    "controls": {
      "annotations": false,
      "export": true,
      "fullscreen": true,
      "labels": {
        "controls": "Chart controls",
        "enterFullscreen": "Enter fullscreen",
        "exitFullscreen": "Exit fullscreen",
        "exportPng": "Download PNG",
        "hideAnnotations": "Hide callouts",
        "loop": "Loop playback",
        "nextFrame": "Next frame",
        "pause": "Pause",
        "play": "Play",
        "previousFrame": "Previous frame",
        "reset": "Reset view",
        "seek": "Playback position",
        "showAnnotations": "Show callouts",
        "speed": "Playback speed",
        "zoomIn": "Zoom in",
        "zoomOut": "Zoom out"
      },
      "playback": false,
      "reset": true,
      "zoom": true
    },
    "hover": true,
    "navigation": {
      "drag": true,
      "keyboard": true,
      "maxZoom": 6,
      "minZoom": 1,
      "pinch": true,
      "wheel": "modifier"
    },
    "tooltip": {
      "fields": [
        {
          "field": "x",
          "format": "number",
          "label": "X"
        },
        {
          "field": "y",
          "format": "number",
          "label": "Y"
        },
        {
          "field": "direction",
          "format": "number",
          "fractionDigits": 0,
          "label": "Direction",
          "suffix": "°"
        },
        {
          "field": "magnitude",
          "format": "number",
          "label": "Magnitude"
        }
      ],
      "title": "Vector field",
      "trigger": "mark"
    }
  },
  "locale": "en",
  "mark": {
    "fields": {
      "direction": "direction",
      "magnitude": "magnitude"
    }
  },
  "padding": {
    "top": 52
  },
  "theme": "graflume-light",
  "title": {
    "subtitle": "Vector field chart uses runnable data and options to demonstrate direction and magnitude arrows; magnitude size and width.",
    "text": "Vector field"
  },
  "width": "container",
  "x": {
    "field": "x",
    "title": "Horizontal position",
    "type": "quantitative"
  },
  "y": {
    "field": "y",
    "title": "Vertical position",
    "type": "quantitative"
  }
};

Graflume.vector('#chart', data, options);

Portable schema

ChartSpec 0.1 · options

{
  "accessibility": {
    "description": "Zoom and pan inspect the rendered surface without changing data axes or values. When playback controls are available, they move through real steps in the order each unique value first appears in the source data.",
    "label": "Vector field example"
  },
  "axes": {
    "x": {
      "format": {
        "fractionDigits": 0,
        "suffix": " km",
        "type": "number"
      },
      "ticks": {
        "count": 5
      },
      "title": {
        "text": "East–west distance"
      }
    },
    "y": {
      "format": {
        "fractionDigits": 0,
        "suffix": " km",
        "type": "number"
      },
      "ticks": {
        "count": 5
      },
      "title": {
        "text": "North–south distance"
      }
    }
  },
  "height": 620,
  "interaction": {
    "controls": {
      "annotations": false,
      "export": true,
      "fullscreen": true,
      "labels": {
        "controls": "Chart controls",
        "enterFullscreen": "Enter fullscreen",
        "exitFullscreen": "Exit fullscreen",
        "exportPng": "Download PNG",
        "hideAnnotations": "Hide callouts",
        "loop": "Loop playback",
        "nextFrame": "Next frame",
        "pause": "Pause",
        "play": "Play",
        "previousFrame": "Previous frame",
        "reset": "Reset view",
        "seek": "Playback position",
        "showAnnotations": "Show callouts",
        "speed": "Playback speed",
        "zoomIn": "Zoom in",
        "zoomOut": "Zoom out"
      },
      "playback": false,
      "reset": true,
      "zoom": true
    },
    "hover": true,
    "navigation": {
      "drag": true,
      "keyboard": true,
      "maxZoom": 6,
      "minZoom": 1,
      "pinch": true,
      "wheel": "modifier"
    },
    "tooltip": {
      "fields": [
        {
          "field": "x",
          "format": "number",
          "label": "X"
        },
        {
          "field": "y",
          "format": "number",
          "label": "Y"
        },
        {
          "field": "direction",
          "format": "number",
          "fractionDigits": 0,
          "label": "Direction",
          "suffix": "°"
        },
        {
          "field": "magnitude",
          "format": "number",
          "label": "Magnitude"
        }
      ],
      "title": "Vector field",
      "trigger": "mark"
    }
  },
  "locale": "en",
  "mark": {
    "fields": {
      "direction": "direction",
      "magnitude": "magnitude"
    }
  },
  "padding": {
    "top": 52
  },
  "theme": "graflume-light",
  "title": {
    "subtitle": "Vector field chart uses runnable data and options to demonstrate direction and magnitude arrows; magnitude size and width.",
    "text": "Vector field"
  },
  "width": "container",
  "x": {
    "field": "x",
    "title": "Horizontal position",
    "type": "quantitative"
  },
  "y": {
    "field": "y",
    "title": "Vertical position",
    "type": "quantitative"
  }
}

Catalog

Modes · compatibility identifiers

The source-controlled catalog maps callable modes in this family and compatibility identifiers to their canonical modes. This table contains executable entries only.

2 modes · 2 compatibility identifiers

Vector field · supported modes · representative vector
IDNameQuick APImodemarkrenderer
vectorVector field chartvector()vectorvectorcanvas
wind-barbWind barb chartwindBarb()wind-barbwind-barbcanvas
Vector field · compatibility identifiers
IdentifierCanonical mode ID
vectorvector
windbarbwind-barb

Manual

Integration checklist

ARIA · table fallback

Accessibility

Canvas ARIA metadata is paired with a text summary and table fallback.

standard · large · ultra

Performance

Standard, large, and ultra profiles bound rendering work.

Chart catalog