Correlation Heatmap Visualization

An interactive visualization of correlations between health metrics from the Heart Disease dataset.

Features

• Interactive Filtering: Adjust the correlation threshold to hide weak correlations
• Smart Sorting: Organize variables by default order, alphabetically, or by correlation strength
• Variable Highlighting: Click to highlight correlations involving a specific variable
• Detailed Tooltips: Hover over cells to see exact correlation values and descriptions
• Responsive Design: Clean, modern UI with helpful controls

Controls

• Threshold Slider: Filter correlations by strength (|r| ≥ value)
• Sort Dropdown: Change the arrangement of variables
• Highlight Selector: Focus on specific variables

Correlation Interpretation

• |r| ≥ 0.7: Strong correlation
• |r| ≥ 0.4: Moderate correlation
• |r| ≥ 0.2: Weak correlation
• |r| < 0.2: Very weak or negligible

Positive correlations (blue) indicate variables increase together, while negative correlations (red) indicate inverse relationships.