deerlab.dd_cos¶

dd_cos = <deerlab.model.Model object>¶

Raised-cosine parametric model

Parameters:

rarray_like: Distance axis, in nanometers.
centerscalar: Center.
fwhmscalar: FWHM.

Returns:

Pndarray: Distance distribution.

Notes

Parameter List

Name	Lower	Upper	Type	Frozen	Unit	Description
`center`	1	20	nonlin	No	nm	Center
`fwhm`	0.1	5	nonlin	No	nm	FWHM

Model

This provides a raised-cosine distribution, defined by $P(r) = \frac{1}{2w}\cos\left(\frac{r-r_0}{w}\pi\right)$ for $r_0-w \le r \le r_0+w$ , and zero otherwise.

Examples

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

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