Configuring Bins

Wind speed bins define the ranges shown in your windrose diagram. WindRose supports both uniform and custom bin configurations.

Opening Bin Settings

Click Configure Bins in the table toolbar to open the bins configuration panel.

Uniform Bins

Create evenly-spaced bins automatically.

Parameters

• Min - Minimum wind speed (e.g., 0)
• Max - Maximum wind speed (e.g., 10)
• Step - Bin width (e.g., 2)

Example

With Min=0, Max=10, Step=2, you get bins:

• 0-2
• 2-4
• 4-6
• 6-8
• 8-10

Click Generate Bins to create them.

Custom Bins

Define specific bin boundaries for irregular ranges.

Format

Enter comma-separated values for bin boundaries:

0, 2, 5, 10, 15

This creates bins:

• 0-2
• 2-5
• 5-10
• 10-15

Rules

• Maximum 9 bins allowed
• Values must be in ascending order
• No duplicates

Current Bins Display

The settings panel shows your current bins. Changing bins will update:

• Table column headers
• Windrose diagram colors and legend
• Data structure (new bins start with 0 values)

Best Practices

Wind Speed Bins

For wind speed data in m/s:

• Light wind: 0-2, 2-4, 4-6
• Moderate: 6-8, 8-10
• Strong: 10-12, 12+

For wind speed in km/h, multiply by 3.6:

• 0-7, 7-14, 14-22, 22-29, 29+

Frequency Bins

If using percentage frequency instead of raw counts:

• Keep bins consistent with data collection methods
• Ensure all bin values sum to ~100% for each direction

Preserving Data

When you change bins, existing data is cleared (all values reset to 0). Use Undo (Cmd/Ctrl+Z) if you change bins accidentally.

Units

The default unit display is m/s (meters per second). This is shown in the windrose diagram's y-axis label. Future versions may allow customizing units.