Ruben Salvador wrote:
> Anyway, this 'deepcopy' really surprised me. I have now looked for it
> and I think I get an idea of it, though I wouldn't expect this
> difference in behavior to happen. From "my logical" point of view a
> copy is a copy, and if I find a method called copy() I can only expe
Ruben Salvador wrote:
> Anyway, this 'deepcopy' really surprised me. I have now looked for it
> and I think I get an idea of it, though I wouldn't expect this
> difference in behavior to happen. From "my logical" point of view a copy
> is a copy, and if I find a method called copy() I can only e
Well, thanks everybody for such a quick help!! I just couldn't imagine what
could arise this difference.
1e-15 is enough precision for what I will be doing, but was just curious.
Anyway, this 'deepcopy' really surprised me. I have now looked for it and I
think I get an idea of it, though I wouldn
On 2009-04-20, at 10:04 AM, David Cournapeau wrote:
>
> Yes, it is legitimate and healthy to worry about the difference - but
> the surprising thing really is the list behavior when you are used to
> numerical computation :) And I maintain that the algorithms are not
> the same in both operations
On Mon, Apr 20, 2009 at 1:47 PM, Matthieu Brucher <
matthieu.bruc...@gmail.com> wrote:
> > I understand the numerical mathematics behind this very well but my
> > point is that his two algorithms appear to be identical (same
> > operations, same order), he simply uses lists in one and arrays in th
> I understand the numerical mathematics behind this very well but my
> point is that his two algorithms appear to be identical (same
> operations, same order), he simply uses lists in one and arrays in the
> other. It's not like he used vectorization or other array-related
> operations - he uses f
On Mon, Apr 20, 2009 at 12:04 PM, David Cournapeau wrote:
> On Tue, Apr 21, 2009 at 12:49 AM, Rob Clewley
> wrote:
> > On Mon, Apr 20, 2009 at 10:48 AM, David Cournapeau
> > wrote:
> >> Rob Clewley wrote:
> >>> David,
> >>>
> >>> I'm confused about your reply. I don't think Ruben was only asking
On Tue, Apr 21, 2009 at 12:49 AM, Rob Clewley wrote:
> On Mon, Apr 20, 2009 at 10:48 AM, David Cournapeau
> wrote:
>> Rob Clewley wrote:
>>> David,
>>>
>>> I'm confused about your reply. I don't think Ruben was only asking why
>>> you'd ever get non-zero error after the forward and inverse transf
On Mon, Apr 20, 2009 at 9:49 AM, Rob Clewley wrote:
> On Mon, Apr 20, 2009 at 10:48 AM, David Cournapeau
> wrote:
> > Rob Clewley wrote:
> >> David,
> >>
> >> I'm confused about your reply. I don't think Ruben was only asking why
> >> you'd ever get non-zero error after the forward and inverse t
On Mon, Apr 20, 2009 at 10:48 AM, David Cournapeau
wrote:
> Rob Clewley wrote:
>> David,
>>
>> I'm confused about your reply. I don't think Ruben was only asking why
>> you'd ever get non-zero error after the forward and inverse transform,
>> but why his implementation using lists gives zero error
Rob Clewley wrote:
> David,
>
> I'm confused about your reply. I don't think Ruben was only asking why
> you'd ever get non-zero error after the forward and inverse transform,
> but why his implementation using lists gives zero error but using
> arrays he gets something of order 1e-15.
>
That's
David,
I'm confused about your reply. I don't think Ruben was only asking why
you'd ever get non-zero error after the forward and inverse transform,
but why his implementation using lists gives zero error but using
arrays he gets something of order 1e-15.
On Mon, Apr 20, 2009 at 9:47 AM, David Co
David Cournapeau wrote:
> Hi Ruben,
>
> Ruben Salvador wrote:
>
>> Hi everybody!
>>
>> First of all I should say I am a newbie with Python/Scipy. Have been
>> searching a little bit (google and lists) and haven't found a helpful
>> answer...so I'm posting.
>>
>> I'm using Scipy/Numpy to do image
Hi Ruben,
Ruben Salvador wrote:
> Hi everybody!
>
> First of all I should say I am a newbie with Python/Scipy. Have been
> searching a little bit (google and lists) and haven't found a helpful
> answer...so I'm posting.
>
> I'm using Scipy/Numpy to do image wavelet transforms via the lifting
> sch
Hi everybody!
First of all I should say I am a newbie with Python/Scipy. Have been
searching a little bit (google and lists) and haven't found a helpful
answer...so I'm posting.
I'm using Scipy/Numpy to do image wavelet transforms via the lifting scheme.
I grabbed some code implementing the trans
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