> > Unfortunately if the value is changed to masked, this is not updated > > in the parent array. This seems very inconsistent. I don't view masked > > values any different than any other value. > > Inconsistent, maybe, useful definitely: > Masking a view and getting the original masked accordingly could be useful, > but I strongly feel that unmasking a view and getting an unmasked orginal is > dangerous.
The use of nan in float ndarrays has behaviour I would consider expected (at least coming from a numpy perspective). I think that the closer the maskedarrays mimic the behavior of ndarrays the easier it will be to remember how to use them and what to expect. from numpy import * a = array([[1,2,3,4,5],[1,2,3,4,5],[1,2,3,4,5]], dtype='f') suba = a[2] suba[1] = nan print a >[[ 1. 2. 3. 4. 5. ] > [ 1. 2. 3. 4. 5. ] > [ 1. -1.#IND 3. 4. 5. ]] print suba >[ 1. -1.#IND 3. 4. 5. ] a[2,2] = nan print a >[[ 1. 2. 3. 4. 5. ] > [ 1. 2. 3. 4. 5. ] > [ 1. -1.#IND -1.#IND 4. 5. ]] print suba >[ 1. -1.#IND -1.#IND 4. 5. ] _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
