On Sat, May 8, 2010 at 9:16 PM, Ryan May <rma...@gmail.com> wrote: > On Sat, May 8, 2010 at 7:52 PM, Gökhan Sever <gokhanse...@gmail.com> > wrote: > > Hello, > > > > Consider my masked arrays: > > > > I[28]: type basic.data['Air_Temp'] > > -----> type(basic.data['Air_Temp']) > > O[28]: numpy.ma.core.MaskedArray > > > > I[29]: basic.data['Air_Temp'] > > O[29]: > > masked_array(data = [-- -- -- ..., -- -- --], > > mask = [ True True True ..., True True True], > > fill_value = 999999.9999) > > > > > > I[17]: basic.data['Air_Temp'].data = > np.ones(len(basic.data['Air_Temp']))*30 > > > --------------------------------------------------------------------------- > > AttributeError Traceback (most recent call > last) > > > > ----> 1 > > 2 > > 3 > > 4 > > 5 > > > > AttributeError: can't set attribute > > > > Why this assignment fails? I want to set each element in the original > > basic.data['Air_Temp'].data to another value. (Because the main > instrument > > was forgotten to turn on for that day, and I am using a secondary > > measurement data for Air Temperature for my another calculation. However > it > > fails. Although single assignment works: > > > > I[13]: basic.data['Air_Temp'].data[0] = 30 > > > > Shouldn't this be working like the regular NumPy arrays do? > > Based on the traceback, I'd say it's because you're trying to replace > the object pointed to by the .data attribute. Instead, try to just > change the bits contained in .data: > > basic.data['Air_Temp'].data[:] = np.ones(len(basic.data['Air_Temp']))*30 > > Ryan > > -- > Ryan May > Graduate Research Assistant > School of Meteorology > University of Oklahoma >
Thanks for the pointer Ryan. Now it works as it is supposed to be. -- Gökhan
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