fit module

gauss(x, *p)

Gauss distribution function.

Parameters

• x – positions where the gauss function will be calculated

• p –

  gauss parameters [a, b, c, d]:

  • a – amplitude (integral = 1 if a = 1/(c*sqrt(2*pi)))

  • b – expected value mu (position of maximum, default = 0)

  • c – standard deviation sigma (variance sigma**2 = c**2)

  • d – vertical offset (default = 0)

Returns

array – gauss values at given positions x

gauss_fit(x, y, e=None, x_fit=None, verbose=False)

Fit Gauss distribution function to data.

Parameters

• x – positions

• y – values

• e – error values

• x_fit – positions of fitted function (default steps is 3*len(x) but min 150)

Returns

• y_fit – values

• popt – parameters of gauss distribution function (amplitude a, expected value mu, standard deviation sigma, vertical offset d)

• FWHM – full width at half maximum

main()

test function