Assign colors to a specific category in stacked bar chart

[valeriabreveglieri]

Hello,
I am trying to assign a specific color to a specific category in a stacked bar chart. Today I don’t have this, so what happens is that, depending on the number of categories selected, they get the colors assigned in the order of the scale.
See screenshots - in the first one, A is dark green, in the second one, B is as A is not selected.
I made an attempt at doing it, but not successful - I get the error message “n.map is not a function”.
Could you please help me to understand how this should be written instead? Pbix attached.
Thanks a lot!
Kind regards
Valeria

ex. DENEB ShowCase question Stacked Bar Chart.pbix (1.3 MB)

[Greg]

Hi @valeriabreveglieri.

You can add a domain array to your scale block to specifically assign the range inside the encoding block:

"encoding": {
	"color": {
	  "legend": {
		"labelFontSize": 10,
		"symbolType": "square"
	  },
	  "field": "Category",
	  "scale": {
		"domain": ["A", "B", "C"],
		"range": [
		  "blue",
		  "red",
		  "green"
		]
	  }
	}
}

Hope this helps.
Greg
eDNA Forum - Deneb Bar Chart Colours.pbix (1.3 MB)

[valeriabreveglieri]

@Greg

"domain": ["A", "B", "C"],

@Greg thanks! I had missed that. Works wonderfully!