Python：如何在绘图中更改多折线图上线条的颜色？ [复制]

Posted 2023-02-18

【中文标题】Python：如何在绘图中更改多折线图上线条的颜色？ [复制]

【英文标题】：Python: How do I change the colors of lines on a multi-line chart in plotly? [duplicate]

【发布时间】：2022-01-15 13:24:33

【问题描述】：

如何更改下面图表中线条的颜色？谢谢

import plotly.express as px

# forecast_eval is a dataframe with an actual number, a forecast 
# number, and upper and lower forecast bounds

# Draw a line chart using 4 columns forecast_eval.columns[2:6]
eval_line = px.line(forecast_eval, x='ds', y=forecast_eval.columns[2:6], 
title='Forecast')

eval_line

Line chart

【参考方案1】：

您尚未提供示例数据，已模拟示例代码所暗示的相同结构的数据框 使用

color_discrete_sequence

的简单案例

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

# forecast_eval is a dataframe with an actual number, a forecast
# number, and upper and lower forecast bounds

forecast_eval = pd.concat(
    [
        pd.DataFrame("ds": np.linspace(0, 100, 1000)),
        pd.DataFrame(
            np.random.uniform(np.linspace(0, 10**4, 5), np.linspace(1, 2*10**4, 5), [1000, 5])
        ),
    ],
    axis=1,
)

# Draw a line chart using 4 columns forecast_eval.columns[2:6]
eval_line = px.line(
    forecast_eval,
    x="ds",
    y=forecast_eval.columns[2:6],
    title="Forecast",
    color_discrete_sequence=["yellow", "blue", "pink", "skyblue"],
)

eval_line