def format_data(data1, data2, dim):
'''
format_data is used to take data from the laser bench and return specially
formatted data for use by get_slope and get_shift. This program assumes
that the [:,1] dimension of the data corresponds to ring radius and that
the data contains both negative and positive angles.
'''
(OneInTwo, TwoInOne) = ADE.multi_where(data1[:,0], data2[:,0])
data1Overlap = data1[OneInTwo]
data2Overlap = data2[TwoInOne]
data1GT = data1Overlap[:,dim][np.where(data1Overlap[:,0] >= 0)]
data1LT = data1Overlap[:,dim][np.where(data1Overlap[:,0] < 0)]
data2GT = data2Overlap[:,dim][np.where(data2Overlap[:,0] >= 0)]
data2LT = data2Overlap[:,dim][np.where(data2Overlap[:,0] < 0)]
data1GT.sort()
data1LT.sort()
data2GT.sort()
data2LT.sort()
return (np.array([data1GT, data2GT]), np.array([data1LT,data2LT]))
