wise-coders opened a new issue, #19075:
URL: https://github.com/apache/echarts/issues/19075
### What problem does this feature solve?
I want to create a crosstab data transformation on a generic data source,
and create a multi-line chart. I would like to specify 'do crosstab
transformation on Time and TableName, and be able to create the multi-line
chart. Is this possible?
```
dataset: { source: [
| ["Time","TableName", "TableSize"],
| ["2023-08-25", "film", 360448],
| ["2023-08-25", "actors", 213441],
| ["2023-08-25", "customers", 38884],
| ["2023-08-26", "film", 320448],
| ["2023-08-26", "actors", 223441],
| ["2023-08-26", "customers", 31884],
```
### What does the proposed API look like?
dataset: { transformation: [ crosstab(Time, TableName)
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