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PublicFeb 21, 2019

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Alternatively, d3Array.rollups(data, v => v.length, d => d.name) will return arrays (nested arrays if you have several keys).

D3 Rollup | Mila Frerichs | ObservableD3 Rollup | Mila Frerichs | Observable

PublicFeb 21, 2019

Comments (1)

Alternatively, d3Array.rollups(data, v => v.length, d => d.name) will return arrays (nested arrays if you have several keys).