Radius of Gyration

The Radius of gyration analysis follows the overall compactness of a selected group along a path or trajectory. It is a classic choice for monitoring expansion, collapse, and large-scale shape changes.

Adding the plot

1. Open Path Analyzer.
2. Choose Radius of gyration in Observable.
3. Choose a Path.
4. Define the Group to analyze.
5. Click Add Time Series or Add Histogram.

Inputs

• One atom-containing selection is required.
• The result is reported in A.

Views

• Time series: follow compactness along the path.
• Histogram: inspect the preferred compactness range.

Tip

• Radius of gyration is a great first diagnostic for folding, compaction, or swelling.
• Pair it with Asphericity or Shape parameter if you also care about how the shape changes, not only how compact it is.