Random Vega Bar Chart Generator

This function creates a random bar chart using the Vega library. The function first randomly selects a color palette and a field as the basis for the bars. Then, it defines a Vega chart specification including the data source, marks, and encoding. Finally, it renders the chart using the Vega library.

Technology Stack : Python, Vega, Pandas

Code Type : The type of code

Code Difficulty :

                
                    
import random

def random_bar_chart(data):
    """
    Generates a random bar chart using Vega library.
    """
    # Randomly select a color palette
    palette = random.choice([
        ['#1f77b4', '#ff7f0e', '#2ca02c', '#d62728', '#9467bd', '#8c564b', '#e377c2', '#7f7f7f', '#bcbd22', '#17becf']
    ])

    # Randomly select a field for the bars
    field = random.choice(data.columns)

    # Define the Vega bar chart specification
    spec = {
        "$schema": "https://vega.github.io/schema/vega/v5.json",
        "height": 400,
        "width": 600,
        "data": [
            {
                "name": "table",
                "values": data
            }
        ],
        "marks": [
            {
                "type": "bar",
                "from": {"data": "table"},
                "encode": {
                    "enter": {
                        "x": {"field": field, "type": "quantitative"},
                        "y": {"field": "count", "type": "quantitative"},
                        "fill": {"value": random.choice(palette)}
                    }
                }
            }
        ],
        "encoding": {
            "y": {
                "field": "count",
                "type": "quantitative",
                "axis": {"title": "Count"}
            }
        }
    }

    # Render the Vega bar chart
    import vega
    vega.display(spec)