perturbopy.postproc.utils.spectra_plots.find_fwhm

perturbopy.postproc.utils.spectra_plots.find_fwhm(x, y, num_interp_points=2000)

Find the Full Width at Half Maximum (FWHM) for a single prominent peak y(x), using an Akima1DInterpolator to create a smooth spline, and root-finding (brentq) for a precise half-max crossing.

Parameters:

  • x (array_like) – 1D array of x-values (assumed sorted in ascending order).

  • y (array_like) – 1D array of y-values corresponding to x.

  • num_interp_points (int, optional) – Number of points for evaluating the Akima spline; default is 2000.

Returns:

  • x_left (float) – x-value at the left FWHM crossing.

  • x_right (float) – x-value at the right FWHM crossing.

  • half_max (float) – Half-maximum value of the peak.