https://bugs.documentfoundation.org/show_bug.cgi?id=159180
Bug ID: 159180
Summary: Add support for refined-doughnut charts
Product: LibreOffice
Version: 7.6.4.1 release
Hardware: All
OS: All
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: Chart
Assignee: [email protected]
Reporter: [email protected]
A "refined doughnut" chart is made up of concentric rings/doughnuts, similarly
to the existing doughnut chart type. The difference is in what each ring
signifies, and in the _increasing_ number of sections in the refined-doughnut
chart type.
You see, in a regular doughnut chart type, one dimension is the ring section,
and the other dimension is the ring index: The charted function is
(row, column) -> datum
But in refined doughnut chart, the data is actually multi-dimensional, with
each step outwards refining the data to another dimension; and the charted
function is (key_1, key_2, ... key_d) -> datum .
For example, if my data table has columns: Region, Town, Neighborhood,
NumBuildings - then the first ring will show the distribution of buildings by
region; the second ring will refine each region's section into its different
towns, and the third (and final) ring will refine that by neighborhoods, so
that the outer ring has as many sections as there are table rows.
This is especially useful in the two-dimensional case, when there is a single
refinement, and one can color the inner ring in strong, contrasting colors, and
color the refinement of each ring with a gradient of the same hue but different
lightness or different saturation etc.
I'll attach a couple of examples.
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