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Data Preparation - Data Visualization


In the world of machine learning, understanding and evaluating your dataset is a crucial step before building and training models. OtasML, a powerful visual machine learning tool, offers a comprehensive Data Visualization page equipped with a wide array of charts. These visualization tools help users to explore their data, identify patterns, and detect anomalies, ensuring that the data is well-understood and ready for modeling. Let’s explore each chart type available on this page and understand how it aids in data evaluation.

Density Heatmap Chart

A Density Heatmap Chart represents the density of data points in a two-dimensional space using colors. This chart is useful for identifying areas of high concentration and detecting patterns in large datasets.

Use Case:

  • Visualizing the density of occurrences in geographical data.
  • Identifying hotspots in customer behavior data.

Density Contour Chart

Similar to a heatmap, the Density Contour Chart uses contour lines to represent the density of data points. It provides a clearer view of the density gradients and is particularly effective for identifying clusters.

Use Case:

  • Analyzing the distribution of data points in a scatter plot.
  • Highlighting regions with varying data point density.

Strip Chart

A Strip Chart displays individual data points along an axis. It is ideal for visualizing the distribution of data points and spotting outliers within small datasets.

Use Case:

  • Comparing the distribution of a numerical variable across different categories.
  • Detecting outliers in a small dataset.

ECDF Chart

An Empirical Cumulative Distribution Function (ECDF) Chart shows the proportion of data points below a given value. It provides a cumulative perspective on data distribution.

Use Case:

  • Assessing the distribution of a variable.
  • Comparing distributions between different groups.

Violin Chart

A Violin Chart combines the features of a box plot and a density plot. It displays the distribution of the data across different categories, highlighting the probability density.

Use Case:

  • Visualizing the distribution of numerical data across different categories.
  • Comparing multiple distributions simultaneously.

Histogram Chart

A Histogram Chart displays the frequency distribution of a continuous variable. It helps in understanding the distribution, central tendency, and variability of the data.

Use Case:

  • Analyzing the distribution of a single numerical variable.
  • Identifying skewness and kurtosis in the data.

Treemap Chart

A Treemap Chart uses nested rectangles to represent hierarchical data. Each rectangle's size is proportional to the value it represents, making it useful for visualizing large hierarchical datasets.

Use Case:

  • Visualizing the composition of hierarchical data, such as sales by region and product.
  • Exploring proportions within a category.

Sunburst Chart

Similar to a treemap, a Sunburst Chart displays hierarchical data using concentric circles. Each segment represents a category, with inner circles representing higher-level categories.

Use Case:

  • Visualizing hierarchical data in a circular layout.
  • Exploring nested categories in a dataset.

Pie Chart

A Pie Chart displays data as slices of a circle, with each slice representing a category's proportion of the whole. It is useful for visualizing relative proportions.

Use Case:

  • Displaying the composition of categorical data.
  • Comparing parts of a whole.

Area Chart

An Area Chart shows trends over time or categories by filling the area beneath a line chart. It emphasizes the magnitude of change over time.

Use Case:

  • Visualizing cumulative data trends.
  • Comparing multiple time series data.

Line Chart

A Line Chart connects data points with a continuous line, making it ideal for showing trends over time.

Use Case:

  • Tracking changes over time.
  • Comparing trends across different categories.

Parallel Categories Chart

A Parallel Categories Chart visualizes categorical data using parallel vertical lines. It helps in exploring relationships between multiple categorical variables.

Use Case:

  • Analyzing relationships between multiple categorical variables.
  • Visualizing complex categorical data.

Parallel Coordinates Chart

A Parallel Coordinates Chart displays multivariate data using parallel axes. Each line represents an observation, making it useful for identifying patterns and correlations.

Use Case:

  • Visualizing high-dimensional data.
  • Identifying correlations between multiple variables.

Bar Chart

A Bar Chart uses rectangular bars to represent data values for different categories. It is effective for comparing quantities across categories.

Use Case:

  • Comparing values across different categories.
  • Visualizing categorical data distributions.

Scatter 3D Chart

A Scatter 3D Chart plots data points in three-dimensional space. It helps in visualizing relationships between three numerical variables.

Use Case:

  • Exploring relationships between three variables.
  • Visualizing data clusters in 3D space.

Scatter Chart

A Scatter Chart plots individual data points on a two-dimensional plane, showing the relationship between two variables.

Use Case:

  • Identifying correlations between two variables.
  • Detecting outliers and trends.

Scatter Matrix Charts

Scatter Matrix Charts display scatter plots for multiple variable pairs in a matrix format. They provide a comprehensive view of relationships between several variables.

Use Case:

  • Exploring pairwise relationships in multivariate data.
  • Detecting patterns and correlations.

Using the Data Visualization Page in OtasML

The Data Visualization page in OtasML is designed to be intuitive and powerful. Here’s how to make the most of it:

  1. Select Chart Type: Choose from a wide range of charts based on the data aspect you wish to explore.
  2. Configure Settings: Customize the chart settings to suit your dataset and visualization needs.
  3. Preview Chart: View a preview of the chart to ensure it meets your expectations and provides the insights you need.


By offering a diverse set of visualization tools, OtasML ensures that users can comprehensively evaluate their data. Whether you need to explore distributions, identify correlations, or visualize hierarchical structures, the Data Visualization page provides the necessary charts to make informed decisions before model training.


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