如何以交互方式显示和隐藏散景图中的线条？

Question

能够以交互方式显示和隐藏散景图中的线条会很不错.说,我创建了这样的情节:

from bokeh.plotting import output_file, figure, show
from numpy.random import normal, uniform

meas_data_1 = normal(0, 1, 100)
meas_data_2 = uniform(-0.5, 0.5, 100)

output_file("myplot.html", title="My plot")
fig = figure(width=500, plot_height=500)

fig.line(x=range(0, len(meas_data_1)), y=meas_data_1)
fig.line(x=range(0, len(meas_data_2)), y=meas_data_2)

show(fig)

如何添加以交互方式启用/禁用两条线之一的可能性？

我知道这是在愿望清单上(请参阅此功能请求),但这听起来不会太快实施.

我的印象是使用CheckBoxGroup和自定义的回调应该是可能的,但不幸的是这个回调必须用JavaScript编写,我完全没有经验.

Answer 1

编辑:互动传说现已内置于Bokeh的图书馆0.12.5,请参阅https://bokeh.github.io/blog/2017/4/5/release-0-12-5/

这似乎有望在某些时候作为交互式传说实现:https: //github.com/bokeh/bokeh/issues/3715

目前(v0.12.1),有一个例子在复选框上使用CustomJS来实现这个目的:https: //github.com/bokeh/bokeh/pull/4868

相关代码:

import numpy as np

from bokeh.io import output_file, show
from bokeh.layouts import row
from bokeh.palettes import Viridis3
from bokeh.plotting import figure
from bokeh.models import CheckboxGroup, CustomJS

output_file("line_on_off.html", title="line_on_off.py example")

p = figure()
props = dict(line_width=4, line_alpha=0.7)
x = np.linspace(0, 4 * np.pi, 100)
l0 = p.line(x, np.sin(x), color=Viridis3[0], legend="Line 0", **props)
l1 = p.line(x, 4 * np.cos(x), color=Viridis3[1], legend="Line 1", **props)
l2 = p.line(x, np.tan(x), color=Viridis3[2], legend="Line 2", **props)

checkbox = CheckboxGroup(labels=["Line 0", "Line 1", "Line 2"],
                         active=[0, 1, 2], width=100)
checkbox.callback = CustomJS(args=dict(l0=l0, l1=l1, l2=l2, checkbox=checkbox),
                             lang="coffeescript", code="""
l0.visible = 0 in checkbox.active;
l1.visible = 1 in checkbox.active;
l2.visible = 2 in checkbox.active;
""")

layout = row(checkbox, p)
show(layout)