filter after group

[winner106]

how can I filter after group, I want to set a filter condition: count>2, I tried d=>d.count>2.... Thanks!

Plot.barX(
	data,
	Plot.filter(
		???????,
		Plot.groupY(
			{x: 'count'},
			{
				y: 'industry',
				sort: {y: 'x', reverse: true},
			}
		)
	)
),

[mbostock]

Either use the filter reducer option in the group outputs

Plot.barX(
  data,
  Plot.groupY(
    {x: "count", filter: (d) => d.length > 2},
    {
      y: "industry",
      sort: {y: "x", reverse: true}
    }
  )
)

or compose the filter transform with the group transform like you originally proposed

Plot.barX(
  data,
  Plot.filter(
    (d) => d.length > 2,
    Plot.groupY(
      {x: "count"},
      {
        y: "industry",
        sort: {y: "x", reverse: true}
      }
    )
  )
)

In either case the filter function is passed the aggregated data, which is the array of data in each group.

[winner106]

Thank You so much!