Вы можете добавить дополнительную ось X, как в этом коде (Bokeh v1.0.4).Или, если хотите, вы можете использовать время для главной оси на 3-м графике.
import pandas as pd
import numpy as np
from bokeh.plotting import figure, show
from bokeh.models import ColumnDataSource, LinearAxis, DatetimeTickFormatter
from bokeh.models.tickers import YearsTicker
from bokeh.layouts import gridplot
t = pd.date_range('2018-01-01', periods = 10, freq = 'H')
x = np.linspace(0, 5, len(t))
y = x ** 2
source = ColumnDataSource({'t': t, 'x': x, 'y': y})
tools = "pan,box_select,box_zoom,reset,wheel_zoom"
p1 = figure(tools = tools, x_axis_type = 'datetime', active_scroll = 'wheel_zoom')
p1.scatter(x = 't', y = 'x', source = source)
p2 = figure(tools = tools, x_axis_type = 'datetime')
p2.x_range = p1.x_range
p2.scatter(x = 't', y = 'x', source = source)
p3 = figure(tools = tools)
p3.extra_x_ranges = { "Time": p1.x_range } # y_range_name = "Volume",
extra_x_axis = LinearAxis(x_range_name = "Time", ticker = YearsTicker())
extra_x_axis.formatter = DatetimeTickFormatter( days = ["%m/%d %H:%M"],
months = ["%m/%d %H:%M"],
hours = ["%m/%d %H:%M"],
minutes = ["%m/%d %H:%M"])
p3.add_layout(extra_x_axis, place = 'below')
p3.scatter(x = 'x', y = 'y', x_range_name = "Time", source = source)
layout = gridplot([[p1, p2, p3]])
show(layout)
Результат:
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