Random Chart Generation with Altair

This function generates a random chart using the Altair library, selecting different chart types based on the input dataframe and applying random colors.

Technology Stack : Altair, Pandas

Code Type : The type of code

Code Difficulty : Advanced

                
                    
import random
import altair as alt
import pandas as pd

def generate_random_chart(dataframe):
    """
    Generates a random chart based on the given dataframe using Altair.
    """
    # Randomly select a chart type from the list of Altair chart types
    chart_types = ['bar', 'line', 'point', 'area', 'bar', 'violin', 'boxplot', 'histogram', 'scatter']
    selected_chart_type = random.choice(chart_types)

    # Randomly select a color for the chart
    color_pallete = alt.PaletteScale(scheme='greenblue')

    # Create a base chart object
    base_chart = alt.Chart(dataframe)

    # Generate the chart based on the selected type
    if selected_chart_type == 'bar':
        chart = base_chart mark=alt.Bar() + alt.X(data='some_column', title='X Axis Title') + alt.Y('some_other_column', title='Y Axis Title')
    elif selected_chart_type == 'line':
        chart = base_chart mark=alt.Line() + alt.X(data='some_column', title='X Axis Title') + alt.Y('some_other_column', title='Y Axis Title')
    elif selected_chart_type == 'point':
        chart = base_chart mark=alt.Point() + alt.X(data='some_column', title='X Axis Title') + alt.Y('some_other_column', title='Y Axis Title')
    elif selected_chart_type == 'area':
        chart = base_chart mark=alt.Area() + alt.X(data='some_column', title='X Axis Title') + alt.Y('some_other_column', title='Y Axis Title')
    elif selected_chart_type == 'violin':
        chart = base_chart mark=alt.Violin() + alt.X(data='some_column', title='X Axis Title') + alt.Y('some_other_column', title='Y Axis Title')
    elif selected_chart_type == 'boxplot':
        chart = base_chart mark=alt.Boxplot() + alt.X(data='some_column', title='X Axis Title') + alt.Y('some_other_column', title='Y Axis Title')
    elif selected_chart_type == 'histogram':
        chart = base_chart mark=alt.Histogram() + alt.X(data='some_column', title='X Axis Title') + alt.Y('some_other_column', title='Y Axis Title')
    elif selected_chart_type == 'scatter':
        chart = base_chart mark=alt.Scatter() + alt.X(data='some_column', title='X Axis Title') + alt.Y('some_other_column', title='Y Axis Title')

    # Add color palette to the chart
    chart = chart.color('some_color_column', scale=color_pallete)

    return chart

# Example usage:
# dataframe = pd.DataFrame({
#     'some_column': [1, 2, 3, 4, 5],
#     'some_other_column': [10, 20, 30, 40, 50],
#     'some_color_column': ['red', 'green', 'blue', 'yellow', 'purple']
# })
# chart = generate_random_chart(dataframe)
# print(chart.to_json())