Drop empty facets

Community Help
1

When using facets, how do I drop empty combinations?

Screenshot 2024-04-08 at 14.07.45

An example code is included here:

Plot.plot({
  marginLeft: 80,
  marginRight: 80,
  color: {legend: true},
  marks: [
    Plot.barX(penguins, 
      Plot.groupY({
        x: "count"
       }, {
         fy: "species",
         y: "island",
         fill: "sex"
       })),
    Plot.frame()
  ]
})

Here is the link to a working document: Facets and missing combinations / workbook | Observable

Update: This is the intended result I am looking for:

Screenshot 2024-04-08 at 14.07.45

2

Can you make a drawing of what you have in mind? (Do you want to remove the labels, or to move the bars?)

3

Updated to show the intended result.

4

Thanks! Yes that could be desirable, but it’s not possible with Plot (yet). You can do an approximation with quite some work:

html`${d3
  .groups(penguins, (d) => d.species)
  .map(([species, penguins], i) =>
    Plot.barX(
      penguins,
      Plot.groupY(
        { x: "count" },
        { fill: "sex", y: "island", order: ["FEMALE", "MALE", null] }
      )
    ).plot({
      marginLeft: 90,
      marginTop: 0,
      marginRight: 50,
      marginTop: 10 * (i > 0),
      marginBottom: 30 * (i === 2),
      //style: "border: 1px solid red",
      height:
        d3.groupSort(
          penguins,
          (v) => null,
          (d) => d.island
        ).length *
          14 +
        20 +
        30 * (i == 2),
      x: { domain: [0, 130], axis: i === 2 },
      y: { label: i == 0 ? undefined : null },
      color: { domain: ["FEMALE", "MALE", null] },
      marks: [
        Plot.text([species], { frameAnchor: "right", textAnchor: "start" })
        // , Plot.frame({stroke: "green")
      ]
    })
  )}`
5

Thanks for the effort. Even for this dummy dataset, it’s so complex. I cannot see myself figuring this out for a larger dataset with x and y facets. I will skip this for now and wait for a proper solution. Thanks again.

6

Yes I’m sorry I don’t have a simpler answer. I’m not even sure how we could make this easier!