Per-axis separators attribute

[ndabAP]

var trace = {
 x: ['2000-01-30', '2000-01-31'],
 y: [1.5, 1.7],
 type: 'scatter' 
};

var data = [trace];

var layout = {
 xaxis: {
 type: 'date',
 },
 yaxis: {
 tickformat: ',.'
 },
};

Plotly.plot('myDiv', data, layout);

Last two axis labels are wrong and the comma format isn't applied. The problem doesn't occur when setting layout.separators = ',.'.

https://codepen.io/anon/pen/LLmWpm

[etpinard]

What should it do? It's not obvious to me from reading the docs.

You might be looking for layout.separator attribute.

[ndabAP]

@etpinard, last two axis labels should be 1,65 and 1,7 not 000000 ... When I define layout.separator as ,. it works without any problem.

What if my x axis values should be comma decimal and my y axis should be dot decimal notation? E. G.:

x: 1.5, 1.7
y: 2.1, 2.5

should be displayed as

x: 1,5, 1,1
y: 2.1, 2.5

Is this possible?

[etpinard]

Is this possible?

Yes, using layout.separators as in https://codepen.io/etpinard/pen/awKoBP?editors=0010

[ndabAP]

@etpinard, thanks for your answer. But it seems that it is not possible to set the separators independently per axis, e. g. yaxis2 has a different separator than yaxis. Is this correct?

[etpinard]

But it seems that it is not possible to set the separators independently per axis, e. g. yaxis2 has a different separator than yaxis. Is this correct?

That's correct. layout.separators is a global setting and there's no corresponding per-axis attribute.

Can I ask? Why do you different separator styles on different axes?

[ndabAP]

Why do you different separator styles on different axes?

Sure. The user within my application can choose their column format which can be a comma or a dot decimal notation. They can upload data and visualize it. Maybe one source of the data has dot, another comma decimal notation. Either way, the user can choose their format.

[etpinard]

Maybe one source of the data has dot, another comma decimal notation.

Hmm. But layout.seperators is meant to control the output format of those numbers on the graph. Wouldn't you want that to be consistent?

[ndabAP]

Wouldn't you want that to be consistent?

I can't make this decision. I let the user decide that. Also it's just the output, not the actual number. Maybe the user can't modify the data before he imports it into my application.

[etpinard]

Ok. Well, we could add attributes xaxis.separtors and yaxis.separators that would either inherit from layout.separators or be set individually. I'll change the issue title accordingly.

This won't be a high priority item for the foreseeable future, so don't expect it getting implementing anytime soon, unless you're willing to make a PR to this repo.

[ndabAP]

Sounds great!