cngi.image.spec_fit

spec_fit(xds, dv='IMAGE', pixel=(0.5, 0.5), pol=0, sigma=2000, name='FIT')[source]

Perform gaussian spectral line fits in the image cube

Adapted from https://github.com/emilyripka/BlogRepo/blob/master/181119_PeakFitting.ipynb Dave Mehringer 2021mar01

Parameters

  • xds (xarray.core.dataset.Dataset) – input Image Dataset

  • dv (str) – name of data_var in xds to smooth. Default is ‘IMAGE’

  • pixel (tuple of int or float) – tuple of integer or float coordinates of pixel to fit. If int, pixel index is used. If float, nearest pixel at that fractional location is used. Default is (0.5,0.5) corresponding to center pixel

  • pol (int) – polarization index to use. Default is 0

  • sigma (float) – sigma of gaussian fit. Default is 1000

  • name (str) – dataset variable name fit, overwrites if already present

Returns

output Image with name added fit results in attributes

Return type

xarray.core.dataset.Dataset