[Numpy-discussion] Rolling window (moving average, moving std, and more)

[Keith Goodman]

On Mon, Jan 3, 2011 at 5:37 AM, Erik Rigtorp <erik at rigtorp.com> wrote:

> It's only a view of the array, no copying is done. Though some
> operations like np.std()  will copy the array, but that's more of a
> bug. In general It's hard to imagine any speedup gains by copying a
> 10GB array.

I don't think that np.std makes a copy of the input data if the input
is an array. If the input is, for example, a list, then an array is
created.