There is a way to assign whole masks in the current implementation:
a = np.arange(9, maskna=True).reshape((3,3))
a
array([[0, 1, 2],
[3, 4, 5],
[6, 7, 8]])
mask = np.array([[False, False, True],
[False, True, False],
It should be possible to remove a mask when copying an array.
This was a concession on the part of those pushing for masks. Eventually, I
ended up realizing that it resulted in a stronger design.
Consider the following:
foo(a[4:10])
Should function foo be able to access the rest of array a,
Yes, to further iterate on that, you can also create multiple masked
views with each its own mask properties. It would be ambiguous to mix
a bit-pattern NA together with standard NA's in the same mask, but you
can make different specialized masked views on the same data.
Also, I like the short
Hi all,
On Thu, Oct 27, 2011 at 7:51 PM, Travis Oliphant oliph...@enthought.com wrote:
I understand exactly what it would take to add bit-patterns to NumPy. I
also understand what Mark did and agree that it is possible to add Matthew's
idea to the current code-base. I think it is worth
On Fri, Oct 28, 2011 at 10:45:09AM +0200, Han Genuit wrote:
Also, I like the short and concise abbreviation for 'Not Applicable',
NA. It has more common uses than IGNORE.
(See also here:
http://www.johndcook.com/R_language_for_programmers.html#missing)
That's a very R centric point a view:
On Thu, Oct 27, 2011 at 8:51 PM, Travis Oliphant oliph...@enthought.comwrote:
As I mentioned. I find the ability to separate an ABSENT idea from an
IGNORED idea convincing.In other words, I think distinguishing between
masks and bit-patterns is not just an implementation detail, but
On 10/27/11 7:51 PM, Travis Oliphant wrote:
As I mentioned. I find the ability to separate an ABSENT idea from an
IGNORED idea convincing. In other words, I think distinguishing between
masks and bit-patterns is not just an implementation detail, but
provides a useful concept for multiple
Hi,
On Thu, Oct 27, 2011 at 10:56 PM, Benjamin Root ben.r...@ou.edu wrote:
On Thursday, October 27, 2011, Charles R Harris charlesr.har...@gmail.com
wrote:
On Thu, Oct 27, 2011 at 7:16 PM, Travis Oliphant oliph...@enthought.com
wrote:
That is a pretty good explanation. I find myself
==
SciPy 2011 Call for Papers
==
The third `SciPy India Conference http://scipy.in`_ will be held
from December 4th through the 7th at the `Indian Institute of
Technology, Bombay (IITB) http://www.iitb.ac.in/`_ in Mumbai,
Maharashtra India.
At this
Hi,
On Fri, Oct 28, 2011 at 9:21 AM, Chris.Barker chris.bar...@noaa.gov wrote:
On 10/27/11 7:51 PM, Travis Oliphant wrote:
As I mentioned. I find the ability to separate an ABSENT idea from an
IGNORED idea convincing. In other words, I think distinguishing between
masks and bit-patterns is
I wonder if that might be handled as a scikits-image extension, rather
than core numpy?
I think Stefan and Nathaniel and Gary Strangman and others are saying
we don't want to pay the price of a large memory hike for masking. I
suspect that Nathaniel is right, and that a large majority of
On Fri, Oct 28, 2011 at 12:39 PM, Matthew Brett matthew.br...@gmail.comwrote:
Hi,
On Thu, Oct 27, 2011 at 10:56 PM, Benjamin Root ben.r...@ou.edu wrote:
On Thursday, October 27, 2011, Charles R Harris
charlesr.har...@gmail.com
wrote:
On Thu, Oct 27, 2011 at 7:16 PM, Travis
On Fri, Oct 28, 2011 at 12:58 PM, Gary Strangman str...@nmr.mgh.harvard.edu
wrote:
I wonder if that might be handled as a scikits-image extension, rather
than core numpy?
I think Stefan and Nathaniel and Gary Strangman and others are saying
we don't want to pay the price of a large
Hi,
On Fri, Oct 28, 2011 at 11:16 AM, Benjamin Root ben.r...@ou.edu wrote:
On Fri, Oct 28, 2011 at 12:39 PM, Matthew Brett matthew.br...@gmail.com
wrote:
Hi,
On Thu, Oct 27, 2011 at 10:56 PM, Benjamin Root ben.r...@ou.edu wrote:
On Thursday, October 27, 2011, Charles R Harris
I haven't actually tested the code, but AFAIK the following is a short overview
with examples of how the two orthogonal feature axis (ABSENT/IGNORE and
PROPAGATE/SKIP) are related and how it all is supposed to work.
I have never talked to Mark or anybody else in this list (that is, outside of
On Fri, Oct 28, 2011 at 11:16 AM, Benjamin Root ben.r...@ou.edu wrote:
this by making missing data front-and-center. However, my belief is that
Mark's approach is easier to comprehend and is cleaner. Cleaner features
means that it is more likely to be used.
Cleaner features may be easier to
2011/10/28 Stéfan van der Walt ste...@sun.ac.za
On Fri, Oct 28, 2011 at 11:16 AM, Benjamin Root ben.r...@ou.edu wrote:
this by making missing data front-and-center. However, my belief is that
Mark's approach is easier to comprehend and is cleaner. Cleaner features
means that it is more
Hi,
On Fri, Oct 28, 2011 at 12:15 PM, Lluís xscr...@gmx.net wrote:
Summarizing: let's forget for a moment that mask has a meaning in english:
This is at the core of the problem. You and I know what's really
going on - there's a mask over the data. But in what follows we're
going to try and
On Tue, Oct 25, 2011 at 12:28 PM, Massimo Di Stefano
massimodisa...@gmail.com wrote:
urllib.urlretrieve('http://www.cdc.noaa.gov/Correlation/amon.us.long.data',
'file.txt') a = np.loadtxt('file.txt', skiprows=1)
but it fails becouse of the txt description at the end of the file,
It's always
On Fri, Oct 28, 2011 at 12:47 PM, Benjamin Root ben.r...@ou.edu wrote:
2011/10/28 Stéfan van der Walt ste...@sun.ac.za
The
implementation as it stands essentially gives us a faster and more
integrated version of numpy.ma; but it has become clear from this
conversation that such an approach
On Fri, Oct 28, 2011 at 3:02 PM, Matthew Brett matthew.br...@gmail.comwrote:
You and I know that I've got an array with values [99, 100, 3] and a
mask with values [False, False, True]. So maybe I'd like to see what
happens if I take off the mask from the second value. I know that's
what I
On Fri, Oct 28, 2011 at 1:14 PM, Benjamin Root ben.r...@ou.edu wrote:
Considering that you have admitted before to not regularly using masked
arrays, I seriously doubt that you would be able to judge whether this is a
significant detriment or not.
Let's not be unreasonable; Matthew has a valid
Hi,
On Fri, Oct 28, 2011 at 1:14 PM, Benjamin Root ben.r...@ou.edu wrote:
On Fri, Oct 28, 2011 at 3:02 PM, Matthew Brett matthew.br...@gmail.com
wrote:
You and I know that I've got an array with values [99, 100, 3] and a
mask with values [False, False, True]. So maybe I'd like to see what
2011/10/28 Stéfan van der Walt ste...@sun.ac.za
On Fri, Oct 28, 2011 at 12:47 PM, Benjamin Root ben.r...@ou.edu wrote:
2011/10/28 Stéfan van der Walt ste...@sun.ac.za
The
implementation as it stands essentially gives us a faster and more
integrated version of numpy.ma; but it has
On Fri, Oct 28, 2011 at 3:22 PM, Matthew Brett matthew.br...@gmail.comwrote:
Hi,
On Fri, Oct 28, 2011 at 1:14 PM, Benjamin Root ben.r...@ou.edu wrote:
On Fri, Oct 28, 2011 at 3:02 PM, Matthew Brett matthew.br...@gmail.com
wrote:
You and I know that I've got an array with values
Hi,
On Fri, Oct 28, 2011 at 1:52 PM, Benjamin Root ben.r...@ou.edu wrote:
On Fri, Oct 28, 2011 at 3:22 PM, Matthew Brett matthew.br...@gmail.com
wrote:
Hi,
On Fri, Oct 28, 2011 at 1:14 PM, Benjamin Root ben.r...@ou.edu wrote:
On Fri, Oct 28, 2011 at 3:02 PM, Matthew Brett
On Tue, Oct 25, 2011 at 2:56 PM, Travis Oliphant oliph...@enthought.com wrote:
I think Nathaniel and Matthew provided very
specific feedback that was helpful in understanding other perspectives of a
difficult problem. In particular, I really wanted bit-patterns
implemented. However, I
Hi,
On Fri, Oct 28, 2011 at 2:16 PM, Nathaniel Smith n...@pobox.com wrote:
On Tue, Oct 25, 2011 at 2:56 PM, Travis Oliphant oliph...@enthought.com
wrote:
I think Nathaniel and Matthew provided very
specific feedback that was helpful in understanding other perspectives of a
difficult
On Fri, Oct 28, 2011 at 2:32 PM, Matthew Brett matthew.br...@gmail.com wrote:
Hi,
On Fri, Oct 28, 2011 at 2:16 PM, Nathaniel Smith n...@pobox.com wrote:
On Tue, Oct 25, 2011 at 2:56 PM, Travis Oliphant oliph...@enthought.com
wrote:
I think Nathaniel and Matthew provided very
specific
On Fri, Oct 28, 2011 at 3:16 PM, Nathaniel Smith n...@pobox.com wrote:
On Tue, Oct 25, 2011 at 2:56 PM, Travis Oliphant oliph...@enthought.com
wrote:
I think Nathaniel and Matthew provided very
specific feedback that was helpful in understanding other perspectives of
a
difficult problem.
Hi,
On Fri, Oct 28, 2011 at 2:41 PM, Charles R Harris
charlesr.har...@gmail.com wrote:
On Fri, Oct 28, 2011 at 3:16 PM, Nathaniel Smith n...@pobox.com wrote:
On Tue, Oct 25, 2011 at 2:56 PM, Travis Oliphant oliph...@enthought.com
wrote:
I think Nathaniel and Matthew provided very
Hi,
On Fri, Oct 28, 2011 at 2:43 PM, Matthew Brett matthew.br...@gmail.com wrote:
Hi,
On Fri, Oct 28, 2011 at 2:41 PM, Charles R Harris
charlesr.har...@gmail.com wrote:
On Fri, Oct 28, 2011 at 3:16 PM, Nathaniel Smith n...@pobox.com wrote:
On Tue, Oct 25, 2011 at 2:56 PM, Travis Oliphant
On Fri, Oct 28, 2011 at 3:56 PM, Matthew Brett matthew.br...@gmail.comwrote:
Hi,
On Fri, Oct 28, 2011 at 2:43 PM, Matthew Brett matthew.br...@gmail.com
wrote:
Hi,
On Fri, Oct 28, 2011 at 2:41 PM, Charles R Harris
charlesr.har...@gmail.com wrote:
On Fri, Oct 28, 2011 at 3:16 PM,
Hi,
On Fri, Oct 28, 2011 at 3:14 PM, Charles R Harris
charlesr.har...@gmail.com wrote:
On Fri, Oct 28, 2011 at 3:56 PM, Matthew Brett matthew.br...@gmail.com
wrote:
Hi,
On Fri, Oct 28, 2011 at 2:43 PM, Matthew Brett matthew.br...@gmail.com
wrote:
Hi,
On Fri, Oct 28, 2011 at 2:41
On Fri, Oct 28, 2011 at 3:21 PM, Benjamin Root ben.r...@ou.edu wrote:
The space issues was never ignored and Mark left room for that to be
addressed. Parameterized dtypes can still be added (and isn't all that
different from multi-na). Perhaps I could be convinced of a having np.MA
2011/10/28 Stéfan van der Walt ste...@sun.ac.za
On Fri, Oct 28, 2011 at 3:21 PM, Benjamin Root ben.r...@ou.edu wrote:
The space issues was never ignored and Mark left room for that to be
addressed. Parameterized dtypes can still be added (and isn't all that
different from multi-na).
On 10/28/11 11:37 AM, Matthew Brett wrote:
The main motivation for the alterNEP was our strong feeling that
separating ABSENT and IGNORE was easier to comprehend and cleaner.
I don't know about easier to comprehend, or cleaner, but it is more
feature-full.
I see two issues here:
1) being
On Fri, Oct 28, 2011 at 3:49 PM, Charles R Harris
charlesr.har...@gmail.com wrote:
2011/10/28 Stéfan van der Walt ste...@sun.ac.za
On Fri, Oct 28, 2011 at 3:21 PM, Benjamin Root ben.r...@ou.edu wrote:
The space issues was never ignored and Mark left room for that to be
addressed.
On Fri, Oct 28, 2011 at 5:05 PM, Chris.Barker chris.bar...@noaa.gov wrote:
On 10/28/11 11:37 AM, Matthew Brett wrote:
The main motivation for the alterNEP was our strong feeling that
separating ABSENT and IGNORE was easier to comprehend and cleaner.
I don't know about easier to comprehend,
On Fri, Oct 28, 2011 at 5:09 PM, Matthew Brett matthew.br...@gmail.comwrote:
On Fri, Oct 28, 2011 at 3:49 PM, Charles R Harris
charlesr.har...@gmail.com wrote:
2011/10/28 Stéfan van der Walt ste...@sun.ac.za
On Fri, Oct 28, 2011 at 3:21 PM, Benjamin Root ben.r...@ou.edu wrote:
The
On Sat, Oct 29, 2011 at 12:37 AM, Matthew Brett matthew.br...@gmail.comwrote:
Hi,
On Fri, Oct 28, 2011 at 3:14 PM, Charles R Harris
charlesr.har...@gmail.com wrote:
On Fri, Oct 28, 2011 at 3:56 PM, Matthew Brett matthew.br...@gmail.com
wrote:
Hi,
On Fri, Oct 28, 2011 at 2:43
On Fri, Oct 28, 2011 at 4:19 PM, Charles R Harris
charlesr.har...@gmail.com wrote:
Memory use is a known problem. One way to start addressing it might be to
implement a bit arraytype. It might even be possible to prototype that on
top of the existing types. Views make bit arrays a bit more
Hi,
On Fri, Oct 28, 2011 at 4:21 PM, Charles R Harris
charlesr.har...@gmail.com wrote:
On Fri, Oct 28, 2011 at 5:09 PM, Matthew Brett matthew.br...@gmail.com
wrote:
On Fri, Oct 28, 2011 at 3:49 PM, Charles R Harris
charlesr.har...@gmail.com wrote:
2011/10/28 Stéfan van der Walt
2011/10/28 Stéfan van der Walt ste...@sun.ac.za
On Fri, Oct 28, 2011 at 4:19 PM, Charles R Harris
charlesr.har...@gmail.com wrote:
Memory use is a known problem. One way to start addressing it might be to
implement a bit arraytype. It might even be possible to prototype that
on
top of
Hi,
On Fri, Oct 28, 2011 at 4:21 PM, Ralf Gommers
ralf.gomm...@googlemail.com wrote:
On Sat, Oct 29, 2011 at 12:37 AM, Matthew Brett matthew.br...@gmail.com
wrote:
Hi,
On Fri, Oct 28, 2011 at 3:14 PM, Charles R Harris
charlesr.har...@gmail.com wrote:
On Fri, Oct 28, 2011 at 3:56
On Friday, October 28, 2011, Matthew Brett matthew.br...@gmail.com wrote:
Hi,
On Fri, Oct 28, 2011 at 4:21 PM, Ralf Gommers
ralf.gomm...@googlemail.com wrote:
On Sat, Oct 29, 2011 at 12:37 AM, Matthew Brett matthew.br...@gmail.com
wrote:
Hi,
On Fri, Oct 28, 2011 at 3:14 PM, Charles R
On Fri, Oct 28, 2011 at 7:53 PM, Benjamin Root ben.r...@ou.edu wrote:
On Friday, October 28, 2011, Matthew Brett matthew.br...@gmail.com wrote:
Hi,
On Fri, Oct 28, 2011 at 4:21 PM, Ralf Gommers
ralf.gomm...@googlemail.com wrote:
On Sat, Oct 29, 2011 at 12:37 AM, Matthew Brett
Hi,
On Fri, Oct 28, 2011 at 4:53 PM, Benjamin Root ben.r...@ou.edu wrote:
On Friday, October 28, 2011, Matthew Brett matthew.br...@gmail.com wrote:
Hi,
On Fri, Oct 28, 2011 at 4:21 PM, Ralf Gommers
ralf.gomm...@googlemail.com wrote:
On Sat, Oct 29, 2011 at 12:37 AM, Matthew Brett
On Fri, Oct 28, 2011 at 6:45 PM, Wes McKinney wesmck...@gmail.com wrote:
On Fri, Oct 28, 2011 at 7:53 PM, Benjamin Root ben.r...@ou.edu wrote:
On Friday, October 28, 2011, Matthew Brett matthew.br...@gmail.com
wrote:
Hi,
On Fri, Oct 28, 2011 at 4:21 PM, Ralf Gommers
On Fri, Oct 28, 2011 at 3:14 PM, Charles R Harris
charlesr.har...@gmail.com wrote:
Matthew, the problem I have is that it seems that you and Nathaniel won't be
satisfied unless things are done *your* way.
Hi Charles,
I'm sorry if I've given this impression, and I know it's easy to feel
this
Matt,
On Friday, October 28, 2011, Matthew Brett matthew.br...@gmail.com wrote:
Forget about rudeness or decision processes.
No, that's a common mistake, which is to assume that any conversation
about things which aren't technical, is not important. Nathaniel's
point is important.
On 10/28/11 10:38 PM, Benjamin Root wrote:
I might like the idea of a NA to always mean absent (and destroys -
even through views), and MA (or some other name) which always means
ignore (and has the masking behavior with views).
I should point out that if I'm dictating code to someone (e.g.,
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