Plotly Choropleth映射未显示数据

Question

我正在Jupyter Notebook中运行它。我将附上完整的代码。我正在使用来自Kaggle的csv文件来绘制世界各地不同国家的累积冠状病毒病例。

以下是Kaggle数据集下载的链接：https://www.kaggle.com/sudalairajkumar/novel-corona-virus-2019-dataset我正在使用“ covid_19_data.csv”文件。

import chart_studio.plotly as py
import plotly.graph_objs as go
import pandas as pd

from plotly.offline import download_plotlyjs, init_notebook_mode, iplot, plot
init_notebook_mode(connected = True)
cf.go_offline()

df = pd.read_csv('covid_19_data.csv')

data = dict(type = 'choropleth',
       locations = df['Country/Region'],
        z = df['Confirmed'],
        text = df['Province/State'],
        colorbar = {'title':'Cases of COVID-19'} )

layout = dict(title = '2020 Global Coronavirus Cases', geo = dict(showframe = False, projection = {'type':'natural earth'}))

choromap = go.Figure(data = [data],layout = layout)

iplot(choromap)

输出是世界的灰色地图。有一个带有颜色的图例和一个标题。我很困惑为什么不绘制数据！

感谢您的帮助！

Answer 1

您需要添加locationmode = 'country names'。

import pandas as pd
import plotly.graph_objs as go
from plotly.offline import init_notebook_mode, iplot
init_notebook_mode(connected = True)

df = pd.read_csv('covid_19_data.csv')

layout = dict(title = '2020 Global Coronavirus Cases', 
              geo = dict(showframe = False, projection = {'type':'natural earth'}))

data = go.Choropleth(locations = df['Country/Region'], 
                     locationmode = 'country names',
                     z = df['Confirmed'],  
                     text = df['Province/State'],
                     colorbar = {'title':'Cases of COVID-19'})

fig = go.Figure(data = data, layout = layout)

iplot(fig)