Hi All, The diag, diagonal, and ravel functions have recently been changed to preserve subtypes. However, this causes lots of backward compatibility problems for matrix users, in particular, scipy.sparse. One possibility for fixing this is to special case matrix and so that these functions continue to return 1-d arrays for matrix instances. This is kind of ugly as `a..ravel` will still return a matrix when a is a matrix, an ugly inconsistency. This may be a case where practicality beats beauty.
Thoughts? Chuck
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