How do I transform tick labels without explicitly specifying breaks? about plotnine HOT 6 CLOSED

That's pretty close, but not quite what I wanted. However, it did help me figure out what I really wanted was this:

+ scale_x_datetime(labels=lambda lst: [x.year if x.month==1 and x.day==1 else "" for x in lst])

As an aside, the scale docs describe the labels argument as a list, specifically:

labels (list, optional) – List of str. Labels at the breaks.

However, given the answer above, it appears that the labels argument can also be a callable that takes a list (array_like?) of breakpoints as input and returns a list of strings as output.

Should the docs be updated? If so, I'm willing to submit a PR.

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Re-opened to serve as a reminder for a tutorial section on date labels and breaks.

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Use date_format from mizani.

+ scale_x_datetime(labels=date_format('%Y'))

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Yes the docs should be updated and a PR would be great. Also, can you add something for the breaks argument. It can be a callable that takes a tuple of limits and returns a list of breaks.

Plus, would something of the sort

+ scale_x_datetime(breaks=date_breaks('2 year'), labels=date_format('%Y'))

have worked for you.

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This was exactly what I was looking for:

+ scale_x_datetime(breaks=date_breaks('1 year'), labels=date_format('%Y'))

I'll submit a PR for the docs.

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Submitted #35

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