Superset Charts

Charts transform raw data into visual representations, making it easier to analyze and interpret information. They help in identifying trends, comparing datasets, and uncovering insights that might not be obvious from tables of data alone. Charts are essential for making informed decisions based on data analysis.

Prerequisites for Creating Charts

Before creating charts in Superset, ensure the following prerequisites are met:

  • Database Connection: A database must be connected to Superset. Supported databases include MySQL, PostgreSQL, SQLite, Oracle, and others.
  • Datasets: The data to be visualized must be organized into datasets. Datasets act as the bridge between the database and the visualization layer.

Types of Charts

Superset offers a wide range of chart types, each serving different purposes:

  • Bar Charts: Ideal for comparing quantities across categories.
  • Line Charts: Perfect for visualizing trends over time.
  • Pie Charts: These are useful for showing the proportions of a whole.
  • Scatter Plots: Great for identifying correlations between variables.
  • Heatmaps: Effective for displaying data density and patterns.
  • Box Plots: Useful for showing data distribution based on a five-number summary.
  • Area Charts: Similar to line charts but filled with color below the line to show volume.
  • Pivot Tables: Summarize data across multiple dimensions, ideal for detailed data analysis.

Creating a New Chart

  1. Open Superset and go to the Charts section.
  2. Click on the + Chart button.
  3. Choose the dataset you want to visualize from the available options.
  4. Select the type of chart you want to create, such as a bar chart, line chart, pie chart, etc.
  5. Set up the metrics, dimensions, and filters to define what data the chart will display.
  6. Customize the appearance and behavior of the chart using various settings and options.
  7. Click the Create Chart button. This will display the chart on the right side. 
  8. Enter the chart name and click the Save button. The chart is ready to be used in the dashboard. 

Editing the Chart

Editing or updating charts in Superset is a straightforward process that allows users to refine their data visualizations based on new insights or requirements. Here’s a guide on how to effectively edit or update your charts.

  1. Open the Chart:  Navigate to the Charts section in Superset and locate the chart you wish to edit. Click on the chart to open it.
  2. Modify Parameters: Adjust the metrics, dimensions, and filters to reflect the new data requirements. Metrics are the quantitative values displayed, dimensions are the categorical fields, and filters help to narrow down the data shown in the chart.
  3. Customize the Appearance: Update the chart's appearance by changing settings such as colors, labels, legends, and titles. This ensures that the chart is not only accurate but also visually appealing.
  4. Apply Changes: Once you have made the necessary adjustments, click on the Run Query or Apply button to refresh the chart with the updated parameters.
  5. Save the Updated Chart: After verifying that the chart displays the desired information, save the changes. This can be done by clicking the Save button, ensuring that the updated chart is stored for future use.

If the chart is part of a dashboard, ensure it is updated there as well. Navigate to the dashboard and add or replace the chart with the updated version.