gaussian_2d_moments

gaussian_2d_moments(data, fit_method, fit_sigma)[source]

Guess the gaussian parameters of a distribution

Use for initial fitting parameters

the gaussian parameters of a 2D distribution by calculating its moments

Modified from : http://scipy-cookbook.readthedocs.io/items/FittingData.html

Parameters:
  • data (float 2D-array) – 2D distribution to evaluate
  • fit_method (string) – fit method that will be used: ‘gaussian_2d_fixedwidth’, ‘gaussian_2d_1width’ or ‘gaussian_2d_2width’
  • fit_sigma (float>0) – standard deviation of the gaussian fit_function. Default is 1.555.
Returns:

(height, x, y), (height, x, y, sigma_x, sigma_y) or (height, x, y, sigma) depending on fit_method
Return type:

floats (number of which depend on the fit_method)