.Barpolar()

The .Barpolar() method in the graph_objects module in Plotly is used to plot bar charts in a polar coordinate system, where each point is defined by two values:

1. Radial distance - This is the distance from the center or origin.
2. Angle - This indicates the position of the bar around the circle.

An example use case is visualizing activity or events over a repeating time period. This includes patterns like time-of-day activity, day-of-week trends, or seasonal variations.

Syntax

plotly.graph_objects.Barpolar(arg=None, r=None, theta=None, width=None, marker=None, ...)

• arg: (Optional) A dictionary of keyword arguments that can be passed to customize the bar polar chart.
• r: (Required) A list or array of radial distances.
• theta: (Required) A list or array of angles corresponding to the bar’s positions around the polar coordinate system.
• width: (Optional) The width of each bar. This defines how thick the bars will appear on the chart.
• marker: (Optional) A dictionary specifying the appearance of the bars, such as color, line properties, and other styling options.

Example

The following example showcases the use of the .Barpolar() method:

import plotly.graph_objects as go

fig = go.Figure(data=go.Barpolar(
    r=[1, 2, 3, 4, 5, 6, 7, 8, 9],
    theta=[69, 141, 213, 285, 357, 429, 501, 573, 645],
    width=[20, 20, 100, 20, 20, 20, 20, 20, 20],
    marker=dict(
        color=['#E6A157', '#F57B42', '#9DC3E6', '#55A868', '#F5DE50',
               '#FF6F61', '#6B5B95', '#88B04B', '#D65076'],
        opacity=0.8
    )
))

fig.show()

This example creates a simple polar bar chart using .Barpolar(). The bars are positioned using radial distances and angular values. Each bar is styled using custom colors and slight a slight opacity for a visually appealing effect.

The above code generates the following output: