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Area Charts

Examples​

Basic Area:

Stacked Area:

Stack 100 Area:

Overlay Area:

Data Structures​

Area charts can work with pivoted or unpivoted data, using 2 dimensions and one measure. To stack or group a chart, one series should be moved to the color facet.

Unpivoted Data:

Pivoted Data

Additionally area charts can plot using several measures at once:

Line Configuration Notes​

Area chart lines offer the same configuration as line charts:

Line Mark​

This is the line icon on each axis, and holds all of the overall configuration options.

Show Points​

Points can be toggles on/off to show alongside the lines (default contains no points).

Dashes vs Solid Lines​

Whether or not series are shown as solid lines or dashed lines is available (default solid).

Line Thickness​

The weight or thickness can be controlled (default 1).

Line Opacity​

Setting is available to make the line partially transparent (default solid).

Point Interpolation for Lines​

The method for interpolation between points can be controls (default linear). Options include:

  • Linear
  • Monotone (smoothed)
  • Step (point at midpoint of the step)
  • Step Before
  • Step After

Overall Configuration Notes​

The mark selector at the top of the configuration sets the global chart configuration (configuration across all series). Note that each series can be set independently to bar, line, scatter, area independently under their y-axis controls

The color section controls overall stacking and grouping behavior overall. Additionally stack can be set independently on the different y-axis, under the y-axis series configuration (useful for overall grouping of two stacked grouplets):

  • Automatic: we'll guess for you
  • Stack: Series on same x-axis value, on top of each other
  • Group: Series offset from their baseline x-axis mark into grouplets
  • Overlay: Series on top of each other (usually very undesirable, but useful in rare cases)
  • Stack %: Series rebased to 100% across each x-axis value

Other Notes​

  • Time dimension axes are set to temporal with area charts, meaning points will be displayed along a continuous time axis. For charts where ordinal behavior is desired, it's recommended to toggle the individual series from a bar chart accelerator.
  • With time fields, order will be automatically set to ascending; other data types will obey the table ordering when graphing
  • Tooltips have two styles (see below):
    • On line charts with multiple measures, hover will highlight all available series along the x-axis vertically, vs just the series being hovered.
    • On line charts with a dimension mapped to color (and a single measure), the hover will only show the nearest point