可以直接修改参数使用，非常的方便。

import numpy as np

import pandas as pd

import holoviews as hv

hv.extension('bokeh')

macro_df = pd.read_csv('http://assets.holoviews.org/macro.csv', '\t')

key_dimensions = [('year', 'Year'), ('country', 'Country')]

value_dimensions = [('unem', 'Unemployment'), ('capmob', 'Capital Mobility'),

('gdp', 'GDP Growth'), ('trade', 'Trade')]

macro = hv.Table(macro_df, kdims=key_dimensions, vdims=value_dimensions)

%%opts Scatter [width=700 height=400 scaling_method='width' scaling_factor=2 size_index=2 show_grid=True]

%%opts Scatter (color=Cycle('Category20') line_color='k')

%%opts NdOverlay [legend_position='left' show_frame=False]

gdp_unem_scatter = macro.to.scatter('Year', ['GDP Growth', 'Unemployment'])

gdp_unem_scatter.overlay('Country')