ptypy.core.xy.round_scan#

ptypy.core.xy.round_scan(dr=1.5e-06, nr=5, nth=5, bullseye=True)#

Generates a round scan

Parameters:

  • nr (int) – Number of radial steps from center, nr + 1 shells will be made

  • dr (float) – Step size (shell spacing)

  • nth (int, optional) – Number of points in first shell

  • bullseye (bool) – If set false, point of origin will be ignored

Returns:

pos – A (N,2)-array of positions.

Return type:

ndarray

Examples

>>> from ptypy.core import xy
>>> from matplotlib import pyplot as plt
>>> pos = xy.round_scan()
>>> plt.plot(pos[:,1], pos[:,0], 'o-'); plt.show()
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