使用 Holoviews，如何设置标题？

Question

我一直在尝试在使用 Holoviews 和 Bokeh 时设置标题。我正在相互叠加 3 个地块。代码如下所示：%%opts Curve [width=900 height=400  show_grid=True tools=['hover'] finalize_hooks=[apply_formatter]]%%opts Curve (color=Cycle('Category20'))%%opts Overlay [ legend_position='bottom' ] Curve (muted_alpha=0.5 muted_color='black' )actual_curve = hv.Curve(df_reg_test, 'date', 'y', label='Actual')existing_curve = hv.Curve(df_reg_test, 'date', 'Forecast Calls', label='Existing Forecast')xgb_curve = hv.Curve(df_reg_test, 'date', 'xgb_pred', label='New Forecast')actual_curve * existing_curve * xgb_curve情节是这样的：如您所见，各个曲线的标签在图例中显示得很好，但我在图的顶部没有标题。如何手动设置标题？

Answer 1

另一种为叠加添加一般标题的方法是使用：

opts.Overlay(title='New title for Overlay')

以下是在 Holoview 叠加图上设置标题的示例：

# import libraries

import numpy as np

import holoviews as hv

from holoviews import opts

hv.extension('bokeh')

# create some sample data

data1 = np.random.normal(size=[50, 2])

data2 = np.random.normal(size=[50, 2])

# create your overlay plot

all_plots = hv.Scatter(data1, label='data1') * hv.Scatter(data2, label='data2')

# add your title to your overlay with opts.Overlay()

all_plots.opts(opts.Overlay(title='New title for Overlay'))

结果图将如下所示：

Answer 2

我发现我可以在叠加选项中添加一个 title_format="my new title" 选项：

%%opts Curve [width=900 height=400  show_grid=True tools=['hover'] finalize_hooks=[apply_formatter]]

%%opts Curve (color=Cycle('Category20'))

%%opts Overlay [ legend_position='bottom' title_format="my new title"] Curve (muted_alpha=0.5 muted_color='black' )

actual_curve = hv.Curve(df_reg_test, 'date', 'y', label='Actual')

existing_curve = hv.Curve(df_reg_test, 'date', 'Forecast Calls', label='Existing Forecast')

xgb_curve = hv.Curve(df_reg_test, 'date', 'xgb_pred', label='New Forecast')

actual_curve * existing_curve * xgb_curve

现在我的情节有一个标题：