Re: [Numpy-discussion] How do I make a diagonal matrix?

[Alan G I. <ai...@am...>]

> Alan G Isaac wrote:=20
>> Why is a.flat not the same as a.A.flat?=20


On Fri, 23 Jun 2006, Travis Oliphant apparently wrote:=20
> It is the same object except for the pointer to the=20
> underlying array.  When asarray(a.flat) get's called it=20
> looks to the underlying array to get the sub-class and=20
> constructs that sub-class (and matrices can never be 1-d). =20
> Thus, it's a "feature"=20


I doubt I will prove the only one to stumble over this.

I can roughly understand why a.ravel() returns a matrix;
but is there a good reason to forbid truly flattening the matrix?

My instincts are that a flatiter object should not have this=20
hidden "feature": flatiter objects should produce=20
a consistent behavior in all settings, regardless of the=20
underlying array. Anything else will prove too surprising.

fwiw,
Alan