[Bug] Gradiation doesn't work in a heatmap with categorization about echarts HOT 3 OPEN

the Minimal Reproduction is hardly "minimal"...
color: {"Critical":['#FFF9C4',... is not a valid syntax.
dimension is missing.
Demo on how to use VisualMap with categories.

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Hello @helgasoft, thank you for your response.
In our case the problem is not using categories in VisualMap, the problem is using them in a VisualMap with Heatmap.
If we don't categorize the heatmap works correctly, but when we try to use categories inside of these VisualMap + HeatMap the gradiation of the heatmap is not possible.

from echarts.

having the same bug, here are my minimal tests cases :

• scatter, with string categories : OK
• heatmap, with string categories : no data
• heatmap, with integer categories : OK
• heatmap, with string categories but the caracters are numbers : OK !

looks like something related to heatmap is trying to cast the categories as integers and it fails when it comes to letters. Maybe something like this ?

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