echarts-bot[bot] commented on issue #16745:
URL: https://github.com/apache/echarts/issues/16745#issuecomment-1078737374
@leavebody It seems you are not using English, I've helped translate the
content automatically. To make your issue understood by more people and get
helped, we'd like to suggest using English next time. 🤗
<details><summary><b>TRANSLATED</b></summary><br>
**BODY**
### What problem does this feature solve?
In a parallel coordinate graph, if a value in a series is missing, the
polyline skips the corresponding axis. This makes it difficult to tell whether
this value is missing or exactly equal to the value of the intersection of the
polyline and the axis. For enum types, a special enum value can be used to
indicate missing values, but for numeric types, there is no way to properly
handle missing values.
Hopefully it's possible to give the y-axis a separate tick for the polyline
with missing values to go through it.
In parallelAxis graph, if a value in a series is missing, the line skips the
corresponding axis. This makes it difficult to tell whether this value is
missing or exactly equal to the value of the intersection of the polyline and
the axis. For enum types , a special enum value can be used to indicate missing
values, but for numeric types, there is no way to handle missing values
sensibly.
### What does the proposed API look like?
parallelAxis: [
{dim: 0, name: schema[0].text},
{dim: 1, name: schema[1].text,
emptyValueHandling: {
method: "extraTick", // or "skip", for the current
behavior
extraTickName: "default",
}
}
...
]
series: [
{
name: 'Beijing',
type: 'parallel',
data: [
[1, , 9, 56, 0.46, 18, 6, 'good'], // empty value in the 2nd
axis will go through an extra tick named "default"
[2, 25, 11, 21, 0.65, 34, 9, 'excellent'],
...
]
},
...
]
</details>
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