generate_xy

xrayvision.transform.generate_xy(number_pixels, center=<Quantity 0. arcsec>, pixel_size=<Quantity 1. arcsec>)

Generate the x or y coordinates given the number of pixels, center and pixel size.

Parameters:

• number_pixels (int) – Number of pixels

• center (float, optional) – Center coordinates

• pixel_size (float, optional) – Size of pixel in physical units (e.g. arcsecs, meters)

Returns:

numpy.array – The generated x, y coordinates

See also

None

Generates corresponding coordinates but un u, v space

Examples

>>> generate_xy(9)
<Quantity [-4., -3., -2., -1.,  0.,  1.,  2.,  3.,  4.] arcsec>

>>> generate_xy(9, pixel_size=2.5 * apu.arcsec)
<Quantity [-10. , -7.5, -5. , -2.5,  0. ,  2.5,  5. ,  7.5, 10. ] arcsec>

>>> generate_xy(9, center=10 * apu.arcsec, pixel_size=2.5 * apu.arcsec)
<Quantity [ 0. ,  2.5,  5. ,  7.5, 10. , 12.5, 15. , 17.5, 20. ] arcsec>