Is there a good way in NumPy to convert from a bit string to a boolean
array?
For example, if I have a 2-byte string s='\xfd\x32', I want to get a
16-length boolean array out of it.
Here's what I came up with:
A = fromstring(s, dtype=uint8)
out = empty(A.size * 8, dtype=bool)
for bit in
On Thu, 09 Apr 2009 01:31:33 -0500, Robert Kern wrote:
On Thu, Apr 9, 2009 at 01:29, Anne Archibald peridot.face...@gmail.com
wrote:
What's wrong with np.amin(a,axis=-1)[...,np.newaxis]?
It's cumbersome, particularly when you have axis=arbitrary_axis.
Quite right. It would nice to be
Hi all,
I often want to use some kind of dimension-reducing function (like min(),
max(), sum(), mean()) on an array without actually removing the last
dimension, so that I can then do operations broadcasting the reduced
array back to the size of the full array. Full example:
table.shape
On Fri, 05 Sep 2008 07:02:38 -0700, SimonPalmer wrote:
another newb question I suspect, but is there a way to instruct argsort
to sort in descending order or should I just sort and reverse?
Just sort and subtract to get the reverse order. I can think of two
reasonable ways to do it with no
On Sun, 24 Aug 2008 23:49:45 -0600, Charles R Harris wrote:
On Sun, Aug 24, 2008 at 9:48 PM, Daniel Lenski [EMAIL PROTECTED]
wrote:
Hi all,
I need to take the determinants of a large number of 3x3 matrices, in
order to determine for each of N points, in which of M tetrahedral
cells they
Hi all,
Is there a good reason why the weights parameter of np.average() doesn't
broadcast properly? This is with the Ubuntu Hardy x86_64 numpy package,
version 1.0.4.
In [293]: a=arange(100).reshape(10,10)
# Things work fine when weights have the exact same shape as a
In [297]: average(a,
On Thu, 14 Aug 2008 04:40:16 +, Daniel Lenski wrote:
I assume that list-of-arrays is more memory-efficient since array
elements don't have the overhead of full-blown Python objects. But
list- of-lists is probably more time-efficient since I think it's faster
to convert the whole array at
Hi all,
I'm using NumPy to read and process data from ASCII UCD files. This is a
file format for describing unstructured finite-element meshes.
Most of the file consists of rectangular, numerical text matrices, easily
and efficiently read with loadtxt(). But there is one particularly nasty
