python 使用 plotly 进行数据分析

一，安装

pip install plotly pandas

二，使用 express 快速画图

如折线图图：

import plotly.express as px

x = [1, 2, 3, 4, 5]
y = [10, 15, 12, 20, 18]

fig = px.line(
    x=x,
    y=y
)

fig.show()

读取csv文件绘图：

import pandas as pd
import plotly.express as px

df = pd.read_csv("data.csv")

fig = px.line(
    df,
    x="编号",
    y="坑深"
)

fig.show()

散点图：

import pandas as pd
import plotly.express as px

df = pd.read_csv("data.csv")

fig = px.scatter(
    df,
    x="压印X",
    y="压印Y",
    color="坑深"
)

fig.show()

三，精细控制 graph_objects

import plotly.graph_objects as go

#创建空白图
fig = go.Figure()

#添加一组数据
fig.add_trace(
    go.Scatter(
        x=[1, 2, 3, 4, 5],
        y=[10, 20, 15, 25, 18],
        mode="markers",
        name="第一组"
    )
)

fig.show()