Support for monthly time axis labels

[maliayas]

What problem does this feature solve?

When I create a time axis which the values are on a monthly basis, echarts creates labels in Y-M-D format, which I'd expect Y-M format. See this JSFiddle: https://jsfiddle.net/up0hq4zL/

Data is like:

"data": [
    ["2019-01", "400"],
    ["2019-02", "500"],
    ["2019-05", "600"],
]

And the outcome is:

And this is the proposed look:

Normally I could make this happen using the xAxis.axisLabel.formatter function; however the timestamps it receives don't correspond to the first day of each month. For example it receives a timestamp for "2019-03-25" which I wouldn't format as YEAR-MONTH because that would mislocate March tick on the x axis because you'd think a tick would mark the beginning of the month.

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[pissang]

Hi, @maliayas

I'd suggest using category type axis. And fill the month missing data with value '-'

[maliayas]

I'll think about that as a workaround, thanks. You may prefer to keep the issue open for future work.

[xiaoyvr]

Month is not a fixed interval. using category will not work if we need an accurate axis.

I'd suggest to add this kind of support or provide a way to customize the split behavior.

[haskelcurry]

Hi, I agree to @xiaoyvr , this functionality is quite commonly required. Can this ticket be reopened?

[pissang]

Hi, we've refactored our time axis in 5.0. We will keep this issue open, please let us know if there are other problems.

https://jsfiddle.net/8tkhcvy4/

[github-actions]

This issue has been automatically marked as stale because it did not have recent activity. It will be closed in 7 days if no further activity occurs. If you wish not to mark it as stale, please leave a comment in this issue.

[github-actions]

This issue has been automatically closed because it did not have recent activity. If this remains to be a problem with the latest version of Apache ECharts, please open a new issue and link this to it. Thanks!