deerlab.dd_circle#

dd_circle = <deerlab.model.Model object>#

Semicircle distribution model

Parameters:
rarray_like

Distance axis, in nanometers.

centerscalar

Center.

radiusscalar

Radius.

Returns:
Pndarray

Distance distribution.

Notes

Parameter List

Name

Lower

Upper

Type

Frozen

Unit

Description

center

1

20

nonlin

No

nm

Center

radius

0.1

5

nonlin

No

nm

Radius

Model

This provides a semi-circle distribution, defined by

P(r) = 2\pi\sqrt{(r-r_0)^2/R^2+1} for r_0-R\le r\le r_0+R and zero otherwise.

Examples

Example of the model evaluated at the start values of the parameters:

(Source code, png, hires.png, pdf)

../_images/deerlab-dd_circle-1.png