[Numpy-discussion] assigning ma.masked. Strange behavior

Ben Park benparkla@gmail....
Sat Jul 4 12:53:27 CDT 2009

import numpy as np
import numpy.ma as ma

# There is no effect on the following assignment of ma.masked.
a1 = ma.arange(10).reshape((2,5))
a1.ravel()[np.array([0,2,2])] = ma.masked

# The following works:
a1 = ma.arange(10)
a1[np.array([0,2,2])] = ma.masked
a1.shape = 2,5

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