带有 HoverTool 的散景线图
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【中文标题】带有 HoverTool 的散景线图【英文标题】:Bokeh Line Plot with HoverTool 【发布时间】:2014-10-16 11:45:38 【问题描述】:我想将 Bokeh HoverTool 与线/散点图一起使用。下面是代码(大部分来自http://docs.bokeh.org/docs/gallery/correlation.html)。在我的示例中,悬停仅显示“acme”行的信息,我无法弄清楚如何使其适用于另一行“choam”。有什么建议/解决方案吗?
from numpy import cumprod, linspace, random
import time
from bokeh.plotting import *
from bokeh.objects import GridPlot, HoverTool
num_points = 20
now = time.time()
dt = 24*3600
dates = linspace(now, now + num_points*dt, num_points)
acme = cumprod(random.lognormal(0.0, 0.04, size=num_points))
choam = cumprod(random.lognormal(0.0, 0.04, size=num_points))
output_file("correlation.html", title="correlation.py example")
source = ColumnDataSource(
data=dict(
acme=acme,
choam=choam,
dates=dates
)
)
figure(x_axis_type = "datetime", tools="hover,pan,wheel_zoom,box_zoom,reset,previewsave")
hold()
line(dates, acme, color='#1F78B4', legend='ACME')
line(dates, choam, color='#FB9A99', legend='CHOAM')
scatter(dates, acme, color='#1F78B4', source = source, fill_color=None, size=8)
scatter(dates, choam, color='#33A02C', fill_color=None, size=8)
curplot().title = "Stock Returns"
grid().grid_line_alpha=0.3
hover = [t for t in curplot().tools if isinstance(t, HoverTool)][0]
hover.tooltips = OrderedDict([
('Price', "@acme"),
('Price', "@choam"),
('Date', "@dates"),
('Date', "@dates"),
])
show()
【问题讨论】:
您的代码实际上似乎对我有用,就像当前版本的 Bokeh (0.4.4) 一样 自 (0.8.2) 起,这不起作用,因为散景的导入已更改。不过可能很容易修复...... 【参考方案1】:对于 0.8,我在多个绘图中使用了类似的东西:
source1 = ColumnDataSource(
data=dict(
acme=acme,
dates=dates
)
)
source2 = ColumnDataSource(
data=dict(
choam=choam,
dates=dates
)
)
scatter(dates, acme, color='#1F78B4', source = source1, fill_color=None, size=8)
scatter(dates, choam, color='#33A02C', source = source2, fill_color=None, size=8)
不保证它会继续工作 - 仍在等待行工具提示:)
【讨论】:
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