Chris Barker chris.bar...@noaa.gov wrote:
The strongest use-case seems to be
for teaching that involves linear algebra concepts, not real production
code.
Not really. SymPy is a better teaching tool.
Some find A*B easier to read than dot(A,B). But with the @ operator in
Python 3.5 it does
On Feb 10, 2015 1:03 AM, cjw c...@ncf.ca wrote:
On 09-Feb-15 2:34 AM, Stefan Reiterer wrote:
Ok that are indeed some good reasons to keep the status quo, especially
since
performance is crucial for numpy.
It's a dillemma: Using the matrix class for linear algebra would be the
correct
way
On Tue, Feb 10, 2015 at 5:40 PM, Chris Barker chris.bar...@noaa.gov wrote:
On Tue, Feb 10, 2015 at 12:28 AM, Todd toddr...@gmail.com wrote:
So maybe the better way would be not to add warnings to braodcasting
operations,
but to overhaul the matrix class
to make it more attractive for
Chris Barker chris.bar...@noaa.gov wrote:
Well, splitting it off is a good idea, seeing as how it hasn't gotten much
love. But if the rest of numpy does not work well with it, then it becomes
even less useful.
PEP 3118 takes care of that.
Sturla
On 09/02/15 08:34, Stefan Reiterer wrote:
So maybe the better way would be not to add warnings to braodcasting
operations, but to overhaul the matrix class
to make it more attractive for numerical linear algebra(?)
I think you underestimate the amount of programming this would take.
Take an
On 8 Feb 2015 23:34, Stefan Reiterer dom...@gmx.net wrote:
Ok that are indeed some good reasons to keep the status quo, especially
since performance is crucial for numpy.
It's a dillemma: Using the matrix class for linear algebra would be the
correct way for such thing,
but the matrix API is
that discussion.
-Stefan
Gesendet:Montag, 09. Februar 2015 um 09:51 Uhr
Von:Nathaniel Smith n...@pobox.com
An:Discussion of Numerical Python numpy-discussion@scipy.org
Betreff:Re: [Numpy-discussion] Silent Broadcasting considered harmful
On 8 Feb 2015 23:34, Stefan Reiterer dom...@gmx.net wrote:
Ok
Schumacher
r...@blue-cove.com An: Discussion of Numerical Python
numpy-discussion@scipy.org Betreff: Re: [Numpy-discussion] Silent
Broadcasting considered harmful
At 02:47 PM 2/8/2015, Simon Wood wrote: Not quite the same. This is
not so much about language semantics as mathematical definitions.
You
On Sun, Feb 8, 2015 at 2:17 PM, Stefan Reiterer dom...@gmx.net wrote:
Till now the only way out of the misery
is to make proper unit tests,
That's the only way out of the misery of software bugs in general --
nothing special here ;-)
Python is a dynamically typed language -- EVERYTHING
Chris Barker chris.bar...@noaa.gov wrote:
Do you realize that:
arr = np.ones((5,))
ar2 = arr * 5
is broadcasting, too?
Perhaps we should only warn for a subset of broadcastings? E.g. avoid the
warning on scalar times array.
I prefer we don't warn about this though, because it might
...@pobox.com
*An:* Discussion of Numerical Python numpy-discussion@scipy.org
numpy-discussion@scipy.org
*Betreff:* Re: [Numpy-discussion] Silent Broadcasting considered harmful
On 8 Feb 2015 13:04, Stefan Reiterer dom...@gmx.net dom...@gmx.net
wrote:
So I suggest that the best would
numpy-discussion@scipy.org
Betreff:Re: [Numpy-discussion] Silent Broadcasting considered harmful
I personally use Octave and/or Numpy for several years now and never ever needed braodcasting.
But since it is still there there will be many users who need it, there will be some use for it.
Uhm, yeah
On Sun, Feb 8, 2015 at 4:08 PM, Eelco Hoogendoorn
hoogendoorn.ee...@gmail.com wrote:
I personally use Octave and/or Numpy for several years now and never ever
needed braodcasting.
But since it is still there there will be many users who need it, there will
be some use for it.
Uhm, yeah,
:* Eelco Hoogendoorn hoogendoorn.ee...@gmail.com
*An:* Discussion of Numerical Python numpy-discussion@scipy.org
*Betreff:* Re: [Numpy-discussion] Silent Broadcasting considered harmful
I personally use Octave and/or Numpy for several years now and never
ever needed braodcasting.
But since
, 08. Februar 2015 um 22:17 Uhr
Von:Charles R Harris charlesr.har...@gmail.com
An:Discussion of Numerical Python numpy-discussion@scipy.org
Betreff:Re: [Numpy-discussion] Silent Broadcasting considered harmful
On Sun, Feb 8, 2015 at 2:14 PM, Stefan Reiterer dom...@gmx.net wrote:
Yeah Im
it, but they
warn about it's usage.
This has indeed it's merits.
Gesendet: Sonntag, 08. Februar 2015 um 22:17 Uhr
Von: Charles R Harris charlesr.har...@gmail.com
An: Discussion of Numerical Python numpy-discussion@scipy.org
Betreff: Re: [Numpy-discussion] Silent Broadcasting considered harmful
:* Eelco Hoogendoorn hoogendoorn.ee...@gmail.com
*An:* Discussion of Numerical Python numpy-discussion@scipy.org
*Betreff:* Re: [Numpy-discussion] Silent Broadcasting considered harmful
I personally use Octave and/or Numpy for several years now and never
ever needed braodcasting.
But since
On Sun, 8 Feb 2015, Stefan Reiterer wrote:
And as already mentioned: other matrix languages also allow it, but they warn
about it's usage.
This has indeed it's merits.
numpy isn't a matrix language. They're arrays. Storing numbers that you are
thinking of as a vector in an array doesn't
Betreff: Re: [Numpy-discussion] Silent Broadcasting considered harmful
On Sun, Feb 8, 2015 at 2:14 PM, Stefan Reiterer dom...@gmx.net wrote:
Yeah I'm aware of that, that's the reason why I suggested a warning level
as an alternative.
Setting no warnings as default would avoid breaking existing
Hi!
As shortly discussed on github:
https://github.com/numpy/numpy/issues/5541
I personally think that silent Broadcasting is not a good thing. I had recently a lot
of trouble with row and column vectors which got bradcastet toghether altough it was
more annoying than useful, especially
I personally use Octave and/or Numpy for several years now and never
ever needed braodcasting.
But since it is still there there will be many users who need it, there
will be some use for it.
Uhm, yeah, there is some use for it. Im all for explicit over implicit, but
personally current
:56 Uhr
Von:Matthew Brett matthew.br...@gmail.com
An:Discussion of Numerical Python numpy-discussion@scipy.org
Betreff:Re: [Numpy-discussion] Silent Broadcasting considered harmful
Hi,
On Sun, Feb 8, 2015 at 1:39 PM, Simon Wood sgwoo...@gmail.com wrote:
On Sun, Feb 8, 2015 at 4:24 PM, Stefan
...@gmail.com
An: Discussion of Numerical Python numpy-discussion@scipy.org
Betreff: Re: [Numpy-discussion] Silent Broadcasting considered harmful
On Sun, Feb 8, 2015 at 2:14 PM, Stefan Reiterer dom...@gmx.net wrote:
Yeah I'm aware of that, that's the reason why I suggested a warning level
...@gmail.com
An: Discussion of Numerical Python numpy-discussion@scipy.org
Betreff: Re: [Numpy-discussion] Silent Broadcasting considered harmful
Hi,
On Sun, Feb 8, 2015 at 1:39 PM, Simon Wood sgwoo...@gmail.com wrote:
On Sun, Feb 8, 2015 at 4:24 PM, Stefan Reiterer dom...@gmx.net wrote:
I
On 8 Feb 2015 13:39, Simon Wood sgwoo...@gmail.com wrote:
I find the broadcasting aspect of Numpy a turn off. If I go to add a 1x3
vector to a 3x1 vector, I want the program to warn me or error out. I don't
want it to do something under the covers that has no mathematical basis or
definition.
.
Gesendet: Sonntag, 08. Februar 2015 um 22:17 Uhr
Von: Charles R Harris charlesr.har...@gmail.com
An: Discussion of Numerical Python numpy-discussion@scipy.org
Betreff: Re: [Numpy-discussion] Silent Broadcasting considered harmful
On Sun, Feb 8, 2015 at 2:14 PM, Stefan Reiterer dom...@gmx.net
Simon Wood sgwoo...@gmail.com wrote:
Not quite the same. This is not so much about language semantics as
mathematical definitions. You (the Numpy community) have decided to
overload certain mathematical operators to act in a way that is not
consistent with linear algebra teachings.
We have
On 08/02/15 23:17, Stefan Reiterer wrote:
Actually I use numpy for several years now, and I love it.
The reason that I think silent broadcasting of sums is bad
comes simply from the fact, that I had more trouble with it, than it
helped me.
In Fortran 90, broadcasting allows us to write
Gesendet:Sonntag, 08. Februar 2015 um 23:52 Uhr
Von:Nathaniel Smith n...@pobox.com
An:Discussion of Numerical Python numpy-discussion@scipy.org
Betreff:Re: [Numpy-discussion] Silent Broadcasting considered harmful
On 8 Feb 2015 13:04, Stefan Reiterer dom...@gmx.net wrote:
So I suggest that the best would
On 2015/02/08 12:43 PM, josef.p...@gmail.com wrote:
For me the main behavior I had to adjust to was loosing a dimension in
any reduce operation, mean, sum, ...
if x is 2d
x - x.mean(1)
we loose a dimension, and it doesn't broadcast in the right direction
Though you can use:
x_demeaned =
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