[App]: wandb.plot.histogram results in incorrect histogram about wandb

[fmamberti-wandb]

Hi @Livvi, sorry to hear you are experiencing this issue. As mentioned in the post you linked, this is a known bug our end. I will add your report to it so we can keep you updated with any progress.

As a workaround, you can edit the Vega specs to something as follow:

{
  "$schema": "https://vega.github.io/schema/vega-lite/v4.json",
  "description": "A simple histogram",
  "data": {"name": "wandb"},
  "transform": [
    {
      "calculate": "if('${field:groupKeys}' === '' || datum['${field:groupKeys}'] === '', false, true)",
      "as": "grouped"
    },
    {
      "calculate": "if('${field:groupKeys}' === '' || datum['${field:groupKeys}'] === '', datum.name, datum['${field:groupKeys}'])",
      "as": "newGroupKeys"
    },
    {
      "calculate": "if('${field:groupKeys}' === '' || datum['${field:groupKeys}'] === '', datum.color, datum['${field:groupKeys}'])",
      "as": "color"
    }
  ],
  "mark": {"type": "bar", "tooltip": {"content": "data"}},
  "encoding": {
    "x": {"bin": true, "field": "${field:value}", "type": "quantitative"},
    "y": {"aggregate": "count", "type": "quantitative"},
    "detail": [{"field": "newGroupKeys", "type": "nominal"}, {"field": "color", "type": "nominal"}],
    "color": {
      "field": "newGroupKeys",
      "type": "nominal",
      "scale": {"range": {"field": "color"}},
      "legend": {"title": null}
    }
  },
  "selection": {"grid": {"type": "interval", "bind": "scales"}},
  "title": "${string:title}",
  "resolve": {"scale": {"color": "independent"}}
}

And save it as a preset to be used directly via the SDK in the future.

[Livvi]

Hi @fmamberti-wandb, I've tried the workaround and it works fine. Thanks for your help!