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Archived discussions · Captured October 28, 2026

Bokeh autofill datetime axis missing values: how to stop it?

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Thomas_Cercato
Thomas_CercatoJan 31, 2018   #1

I’m trying to build an interactive plot from a pandas dataframe
of financial data. The dataframe index has some gap when market are closed, or during weekends. The problem is that Bokeh always autofill those gaps when I use the dataframe index as xasis, making it visually ugly.

How can I print my data without gaps? In my index I don’t have datetime values for when the markets are closed, or weekends or holidays, but it’s like Bokeh automatically creates them just to connect the y value of the last
day that I have, with the first y value of the next day.

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p-himik
p-himikJan 31, 2018   #2

I don’t think that possible out-of-the-box. You need a non-continuous axis, and only non-continuous axis that Bokeh offers is CategoricalAxis that is definitely not for your case.
A workaround would be to patch the data itself to make it continuous, and then set a custom ticker for the x-axis that would display all values continuously, apart from those gaps

Regards,

Eugene

···

On Wednesday, January 31, 2018 at 11:54:07 PM UTC+7, Thomas Cercato wrote:

I’m trying to build an interactive plot from a pandas dataframe
of financial data. The dataframe index has some gap when market are closed, or during weekends. The problem is that Bokeh always autofill those gaps when I use the dataframe index as xasis, making it visually ugly.

How can I print my data without gaps? In my index I don’t have datetime values for when the markets are closed, or weekends or holidays, but it’s like Bokeh automatically creates them just to connect the y value of the last
day that I have, with the first y value of the next day.

⌁   Link to post
Bryan
BryanJan 31, 2018   #3

Here is an example someone contributed a long time ago that does that:

  https://github.com/bokeh/bokeh/blob/master/examples/plotting/file/custom_datetime_axis.py

As noted, it's not "out of the box" basically you will have to use the integer index as the x-axis and then add tick label overrides to label them as dates.

Thanks,

Bryan

···

On Jan 31, 2018, at 11:02, Eugene Pakhomov <p1himik@gmail.com> wrote:

I don't think that possible out-of-the-box. You need a non-continuous axis, and only non-continuous axis that Bokeh offers is CategoricalAxis that is definitely not for your case.
A workaround would be to patch the data itself to make it continuous, and then set a custom ticker for the x-axis that would display all values continuously, apart from those gaps

Regards,
Eugene

On Wednesday, January 31, 2018 at 11:54:07 PM UTC+7, Thomas Cercato wrote:

I'm trying to build an interactive plot from a pandas dataframe of financial data. The dataframe index has some gap when market are closed, or during weekends. The problem is that Bokeh always autofill those gaps when I use the dataframe index as xasis, making it visually ugly.

How can I print my data without gaps? In my index I don't have datetime values for when the markets are closed, or weekends or holidays, but it's like Bokeh automatically creates them just to connect the y value of the last day that I have, with the first y value of the next day.

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