a = np.arange(1, 101).reshape(10, 10)
a array([[ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10], [ 11, 12, 13, 14, 15, 16, 17, 18, 19, 20], [ 21, 22, 23, 24, 25, 26, 27, 28, 29, 30], [ 31, 32, 33, 34, 35, 36, 37, 38, 39, 40], [ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50], [ 51, 52, 53, 54, 55, 56, 57, 58, 59, 60], [ 61, 62, 63, 64, 65, 66, 67, 68, 69, 70], [ 71, 72, 73, 74, 75, 76, 77, 78, 79, 80], [ 81, 82, 83, 84, 85, 86, 87, 88, 89, 90], [ 91, 92, 93, 94, 95, 96, 97, 98, 99, 100]])
def reclass_2(a): '''reclassification using ufunc user functions''' if a > 80 and a != 91: a = 8 elif a > 60 and a <= 80: a = 7 elif (a <= 60) and (a % 2 == 0): a = 2 else: a = 0 return a
r = np.frompyfunc(reclass_2, 1, 1)
r <ufunc '? (vectorized)'>
val =r(a)
array([[0, 2, 0, 2, 0, 2, 0, 2, 0, 2], [0, 2, 0, 2, 0, 2, 0, 2, 0, 2], [0, 2, 0, 2, 0, 2, 0, 2, 0, 2], [0, 2, 0, 2, 0, 2, 0, 2, 0, 2], [0, 2, 0, 2, 0, 2, 0, 2, 0, 2], [0, 2, 0, 2, 0, 2, 0, 2, 0, 2], [7, 7, 7, 7, 7, 7, 7, 7, 7, 7], [7, 7, 7, 7, 7, 7, 7, 7, 7, 7], [8, 8, 8, 8, 8, 8, 8, 8, 8, 8], [0, 8, 8, 8, 8, 8, 8, 8, 8, 8]], dtype=object)
val.astype(np.int32) Out[8]: array([[0, 2, 0, 2, 0, 2, 0, 2, 0, 2], [0, 2, 0, 2, 0, 2, 0, 2, 0, 2], [0, 2, 0, 2, 0, 2, 0, 2, 0, 2], [0, 2, 0, 2, 0, 2, 0, 2, 0, 2], [0, 2, 0, 2, 0, 2, 0, 2, 0, 2], [0, 2, 0, 2, 0, 2, 0, 2, 0, 2], [7, 7, 7, 7, 7, 7, 7, 7, 7, 7], [7, 7, 7, 7, 7, 7, 7, 7, 7, 7], [8, 8, 8, 8, 8, 8, 8, 8, 8, 8], [0, 8, 8, 8, 8, 8, 8, 8, 8, 8]])
val.astype(np.float32)
array([[ 0., 2., 0., 2., 0., 2., 0., 2., 0., 2.], [ 0., 2., 0., 2., 0., 2., 0., 2., 0., 2.], [ 0., 2., 0., 2., 0., 2., 0., 2., 0., 2.], [ 0., 2., 0., 2., 0., 2., 0., 2., 0., 2.], [ 0., 2., 0., 2., 0., 2., 0., 2., 0., 2.], [ 0., 2., 0., 2., 0., 2., 0., 2., 0., 2.], [ 7., 7., 7., 7., 7., 7., 7., 7., 7., 7.], [ 7., 7., 7., 7., 7., 7., 7., 7., 7., 7.], [ 8., 8., 8., 8., 8., 8., 8., 8., 8., 8.], [ 0., 8., 8., 8., 8., 8., 8., 8., 8., 8.]], dtype=float32)
val.astype(np.str) Out[10]: array([['0', '2', '0', '2', '0', '2', '0', '2', '0', '2'], ['0', '2', '0', '2', '0', '2', '0', '2', '0', '2'], ['0', '2', '0', '2', '0', '2', '0', '2', '0', '2'], ['0', '2', '0', '2', '0', '2', '0', '2', '0', '2'], ['0', '2', '0', '2', '0', '2', '0', '2', '0', '2'], ['0', '2', '0', '2', '0', '2', '0', '2', '0', '2'], ['7', '7', '7', '7', '7', '7', '7', '7', '7', '7'], ['7', '7', '7', '7', '7', '7', '7', '7', '7', '7'], ['8', '8', '8', '8', '8', '8', '8', '8', '8', '8'], ['0', '8', '8', '8', '8', '8', '8', '8', '8', '8']], dtype='<U1')
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