如何使用 Plotly Choropleth 显示分类变量的所有值

Question

任务是在鼠标悬停在州上时显示州类别，但它只显示所有州的最后一个选项，即蔬菜。

这是我试过的代码。

fig = px.choropleth(data, 
                    locations="id", 
                    geojson=state,
                    color="Category",
                    hover_name="State",
                    scope="usa",
                    hover_data = ["Year", "Dollars"]
                    )

fig.show()

我现在得到的结果。

如何显示类别变量中的所有值？

数据集Link：https://github.com/satyam2829/Choropleth

Answer 1

您的数据似乎不太适合您要实现的目标。有de-duped 总结
- 创建了 ColumnList state
- 创建了类别状态中的类别数
修改 plotly express choropleth() 以使用此汇总数据
为了使颜色正确，通常情况下您需要定义 featureidkey 到 link 数据框列以在 GeoJSON[=27] 中适当属性 =]

import requests
import pandas as pd
import numpy as np
import plotly.express as px

state = requests.get(
    "https://raw.githubusercontent.com/satyam2829/Choropleth/main/us-states.json"
).json()
data = pd.read_csv(
    "https://raw.githubusercontent.com/satyam2829/Choropleth/main/WeeklyFoodPrices.csv"
)
data["Date"] = pd.to_datetime(data["Date"])


# 1. de-dup data,  take just last date for each state
# 2. summarise data for state as each state has many categories
data = (
    data.merge(
        data.groupby("State", as_index=False).agg({"Date": "max"}),
        on=["State", "Date"],
        how="inner",
    )
    .groupby(["State", "Date"], as_index=False)
    .agg(
        Category=("Category", "last"),
        Dollars=("Dollars", "last"),
        LastYear=("LastYear", "last"),
        CategoryList=("Category", list),
        Categories=("Category","size")
    )
)

fig = px.choropleth(
    data,
    locations="State",
    featureidkey="properties.name",  # needed as this is the common property
    geojson=state,
    color="Category",
    hover_name="State",
    scope="usa",
    hover_data=["LastYear", "Dollars", "Categories", "CategoryList"],
)

fig

如何使用 Plotly Choropleth 显示分类变量的所有值

How to display all the values of the categorical variable using Plotly Choropleth

python

plotly

data-visualization