29 lines
1.0 KiB
Markdown
29 lines
1.0 KiB
Markdown
# Radial Profile
|
||
|
||
Compute the azimuthally averaged radial profile from a centre point. The output x-axis is radius in physical xy units. Equivalent to gwy_data_field_angular_average used by Gwyddion's Radial Profile tool.
|
||
|
||
## Inputs
|
||
|
||
| Name | Type | Required | Description |
|
||
|------|------|----------|-------------|
|
||
| field | DATA_FIELD | Yes | Input field |
|
||
|
||
## Outputs
|
||
|
||
| Name | Type | Description |
|
||
|------|------|-------------|
|
||
| profile | LINE | Radially averaged profile vs. radius |
|
||
|
||
## Controls
|
||
|
||
| Name | Type | Default | Description |
|
||
|------|------|---------|-------------|
|
||
| cx | FLOAT | 0.5 | Centre x position as a fraction of field width (0 = left, 1 = right) |
|
||
| cy | FLOAT | 0.5 | Centre y position as a fraction of field height (0 = top, 1 = bottom) |
|
||
| n_bins | INT | 128 | Number of radial bins (4–4096) |
|
||
|
||
## Limitations
|
||
|
||
- Pixels are assigned to radial bins by Euclidean distance; bins near the centre contain fewer pixels and may be noisier.
|
||
- Physical x-axis units come from the field's si_unit_xy; uncalibrated fields produce pixel-unit radii.
|