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Data Visualization - Pie chart


Pie charts are a popular tool for visualizing the proportional distribution of data, making it easy to compare parts of a whole. OtasML, a visual machine learning tool, includes a Pie Chart feature within its data preparation model. This feature allows users to create customizable pie charts, offering a clear representation of categorical data distributions. This article outlines how to configure the Pie Chart feature to enhance your data visualization.


The Pie Chart tool in OtasML provides various options for customizing and visualizing data, allowing users to tailor the appearance and dimensions of their charts. Below are the key configurations and options available:


  • Default Value: None
  • Description: This option allows users to select specific columns for visualizing their data. By specifying the subset of columns, users can focus on the variables of interest, ensuring that the pie chart provides meaningful insights.


  • Default Value: None
  • Description: Provide a specific height value for the chart. Only integer values are allowed. Setting a height helps maintain the aspect ratio of the chart, ensuring that the visualization is clear and well-proportioned.


  • Default Value: None
  • Description: This option allows users to specify the color of different elements in the chart. By customizing the colors, users can enhance the visual appearance of the chart, making it easier to distinguish between different data segments.


  • Default Value: None
  • Description: Represents the numerical values associated with each segment or slice of the pie. Pie charts are used to visualize the distribution of a categorical variable as a proportion of a whole, and the value parameter determines the size of each segment relative to the whole pie.

Interactive Button: Preview

To enhance user experience and provide greater control over the pie chart visualization, the tool includes a Preview button:

  • Preview: This button allows users to see the effects of their configuration in real-time without permanently applying the changes. By clicking Preview, users can visually assess how the pie chart will appear based on the current configurations, ensuring that the visualization is appropriate before committing to any changes.


The Pie Chart tool in OtasML provides a versatile solution for visualizing proportional data distributions. By allowing users to select specific columns, set the chart height, customize colors, and define the value parameter, the tool offers greater flexibility and control over the data visualization process. The inclusion of an interactive Preview button further enhances the user experience, ensuring confidence in the pie chart configuration. OtasML continues to empower users with intuitive and effective tools, making data visualization a seamless and integral part of the machine learning workflow.


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