散景中的标签和颜色字形

Question

我正在尝试散景。到目前为止这很有趣。但我并没有完全掌握它。我的目标是制作一个简单但可交互的散点图。

我有三个主要问题：

我想用 names
我希望根据 colors
我喜欢可以决定是否显示颜色和名称的小部件。

这是我到目前为止所做的。我尝试使用 LabelSet 但我卡住了。任何帮助是极大的赞赏！

# interactive widget bokeh figure
from bokeh.io import curdoc
from bokeh.layouts import row, widgetbox
from bokeh.models import ColumnDataSource
from bokeh.models.widgets import Slider, TextInput
from bokeh.plotting import figure
from bokeh.models import Range1d, LabelSet, Label
import numpy as np

# data
x = [-4, 3, 2, 4, 10, 11, -2, 6]
y = [-3, 2, 2, 9, 11, 12, -5, 6]
names = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H']
colors =['r', 'y', 'y', 'r', 'g', 'g', 'g', 'g']



p = figure(plot_height=400, plot_width=400, title="a little interactive chart",         
                tools="crosshair,pan,reset,save,wheel_zoom",
                x_range=[-10, 10], y_range=[-10, 10])

labels = LabelSet(x='x', y='y', text='names', level='glyph',
         x_offset=5, y_offset=5)

p.add_layout(labels)


p.circle(x, y, fill_color="red", line_color="red", size=6)

# Set up widgets
text = TextInput(title="title", value='a little interavtive chart')

# Set up callbacks
def update_title(attrname, old, new):
    p.title.text = text.value

text.on_change('value', update_title)

# # Set up layouts and add to document
inputs = widgetbox(text, names)

curdoc().add_root(row(inputs, p, width=800))
curdoc().title = "Sliders"

Answer 1

通常，您使用 LabelSet 时将其配置为与某些字形渲染器相同的数据源。我发现每当共享列数据源时，最好也明确地创建它们。这是呈现代码的更新版本：

# interactive widget bokeh figure
from bokeh.io import curdoc
from bokeh.layouts import row, widgetbox
from bokeh.models import ColumnDataSource, Range1d, LabelSet, Label
from bokeh.models.widgets import Slider, TextInput
from bokeh.plotting import figure

# data
x = [-4, 3, 2, 4, 10, 11, -2, 6]
y = [-3, 2, 2, 9, 11, 12, -5, 6]
names = ['A', 'B', 'C', 'D', 'E', 'F', 'G', 'H']
colors =['r', 'y', 'y', 'r', 'g', 'g', 'g', 'g']

# create a CDS by hand
source = ColumnDataSource(data=dict(x=x, y=y, names=names, colors=colors))

p = figure(plot_height=400, plot_width=400, title="a little interactive chart",
           tools="crosshair,pan,reset,save,wheel_zoom",
           x_range=[-10, 10], y_range=[-10, 10])

# pass the CDS here, and column names (not the arrays themselves)
p.circle('x', 'y', fill_color="red", line_color="red", size=6, source=source)

# pass the CDS here too
labels = LabelSet(x='x', y='y', text='names', level='glyph',
         x_offset=5, y_offset=5, source=source)
p.add_layout(labels)

# Set up widgets
text = TextInput(title="title", value='a little interavtive chart')

# Set up callbacks
def update_title(attrname, old, new):
    p.title.text = text.value

text.on_change('value', update_title)

# # Set up layouts and add to document
inputs = widgetbox(text)

curdoc().add_root(row(inputs, p, width=800))
curdoc().title = "Sliders"

我还从 widgetbox 中删除了 names，因为小部件框只能包含小部件模型。也许您打算在 Select 小部件或其他东西中使用这些名称？

散景中的标签和颜色字形

Label and color glyph in bokeh

label

widget

python-3.x

bokeh