【问题标题】：How to set different colors for bars in a plotly waterfall chart?如何在情节瀑布图中为条形设置不同的颜色？
【发布时间】：2020-10-10 15:59:04
【问题描述】：

我有一个瀑布图，我想分别设置每个条的颜色（第一个为蓝色，第二个、第三个和第四个为红色，第五个为绿色，第六个为蓝色）。图表中的所有相关条都在增加，而 plotly 只允许您设置增加、减少和总计三种颜色。有什么方法可以做我想做的事吗？

import plotly.graph_objects as go

fig = go.Figure(go.Waterfall(
    name = "20", orientation = "v",
    measure = ["relative", "relative", "relative", "relative", "relative", "total"],
    x = ["Buy", "Transaction Cost", "Remodeling Cost", "Ownership Cost", "Gain", "Sell"],
    textposition = "outside",
    text = ["$200", "$14", "$45", "$5", "$86", "$350"],
    y = [200, 14, 45, 5, 86, 350],
    connector = {"visible": False}
))
fig.show()

结果：

正如我所说，我希望栏的颜色是：

blue for the first one, red for the 2nd, 3rd, and 4th one, green for 5th one, and blue for 6th one

【问题讨论】：

标签： python plotly

【解决方案1】：

问题

Ploty 瀑布图条形颜色自定义。正如 OP 所提到的，目前 plotly 支持自定义条形颜色以减少、增加和总计。

解决方案

在 OP 的示例中，制作条形的颜色（蓝色、红色、红色、红色、绿色、蓝色）：

在increasing 属性中设置标记颜色为红色
在totals 属性中设置标记颜色为蓝色
通过.add_shape()将蓝色和绿色的形状添加到第 1 和第 4 条

import plotly.graph_objects as go

fig = go.Figure(go.Waterfall(
    name = "20", orientation = "v",
    measure = ["relative", "relative", "relative", "relative", "relative", "total"],
    x = ["Buy", "Transaction Cost", "Remodeling Cost", "Ownership Cost", "Gain", "Sell"],
    textposition = "outside",
    text = ["$200", "$14", "$45", "$5", "$86", "$350"],
    y = [200, 14, 45, 5, 86, 350],
    increasing = {"marker":{"color":"red"}},
    totals = {"marker":{"color":"blue"}},
    connector = {"visible": False}
))

fig.add_shape(
    type="rect", fillcolor="blue", line=dict(color="blue"), opacity=1,
    x0=-0.4, x1=0.4, xref="x", y0=0.0, y1=fig.data[0].y[0], yref="y"
)

fig.add_shape(
    type="rect", fillcolor="green", line=dict(color="green"), opacity=1,
    x0=3.6, x1=4.4, xref="x",
    y0=fig.data[0].y[-1] - fig.data[0].y[-2], y1=fig.data[0].y[-1], yref="y"
)

fig.show()

这会产生 OP 想要的结果

参考

【讨论】：