[Matplotlib-users] double tick labels (bottom and top, but with different labels)

[vincent.adrien at gmail.com]

Hi Pierre,

Related to your last idea, maybe you'll find useful the following formatter:
```python
FuncFormatter(lambda x, pos: f"{x:g}\n{a*x + b:g}")
```
as one can multiline strings as tick labels, to get something as shown 
in the attached PDF (the whole script is provided as well). I guess that 
one can even do fancier stuff by leveraging the [string formatting 
Python 
language](https://docs.python.org/3/library/string.html#format-specification-mini-language).

If you find a better way to achieve what you want, please note that 
there would be at least one person glad to read about ;).

Best,
Adrien


On 04/26/2018 08:03 AM, Pierre Haessig wrote:
> Thanks for all your feedback. Interesting to see that there are indeed
> issues and PR on this topic.
> 
> Looking at issue https://github.com/matplotlib/matplotlib/issues/10976,
> it's makes no relation to the label2
> https://github.com/matplotlib/matplotlib/issues/8181. Seems more like a
> "smart twinx", because the ENH propose that the ticks are not
> necessarily at the same position.
> 
> In my case, since I can use the same xtick positions, I think in the end
> I can get away with just using one FuncFormatter which shows the two
> numbers. Using Adrien's suggestion, I need to try something like
> FuncFormatter(lambda x, pos: f"{x} -- {a*x+b}")).
> 
> Best,
> 
> Pierre
> 
> 
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