Re: [Tutor] Pyuthon 3 Combine 1 D Arrays

2017-05-18 Thread Stephen P. Molnar 

On 05/17/2017 06:15 PM, Luis JM Amoreira wrote:

Hi,
If your arrays have shape (300,1) (single column, 300 rows right?) then
M = numpy.hstack((array1, array2)) is an array with shape (300, 2) (300
rows, 2 columns) and M.T is 2 by 300 [shape (2, 300)]. Take an example:

In [11]: import numpy as np

In [12]: a1=np.random.rand(3,1)

In [13]: a1
Out[13]:
array([[ 0.09042866],
[ 0.63008665],
[ 0.99106757]])

In [14]: a2=np.random.rand(3,1)

In [15]: np.hstack((a1,a2))
Out[15]:
array([[ 0.09042866,  0.99965848],
[ 0.63008665,  0.12334957],
[ 0.99106757,  0.43502637]])

In [16]: np.hstack((a1,a2)).T
Out[16]:
array([[ 0.09042866,  0.63008665,  0.99106757],
[ 0.99965848,  0.12334957,  0.43502637]])

Hope this helps!
ze


On 05/17/2017 08:50 PM, Stephen P. Molnar wrote:

I'm beginning to think that I don't know how to ask the question as
Google and Stack Overflow have resulted in nothing.  All of the
results seem to deal with integers.

I have a number of single column floating point arrays each containing
300 entries that I want to combine into a n by 300 array where n is
the number of single column arrays.

I have tried zip, np.concatenate etc with only failure.

Thanks in advance.



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Thanks for your reply.

Here's what I get:

Traceback (most recent call last):

  File "", line 1, in 

runfile('/home/comp/Apps/Python/Molecular_Transforms/Basic/MolT_app_1.py', 
wdir='/home/comp/Apps/Python/Molecular_Transforms/Basic')


  File 
"/home/comp/Apps/anaconda3/lib/python3.6/site-packages/spyder/utils/site/sitecustomize.py", 
line 880, in runfile

execfile(filename, namespace)

  File 
"/home/comp/Apps/anaconda3/lib/python3.6/site-packages/spyder/utils/site/sitecustomize.py", 
line 102, in execfile

exec(compile(f.read(), filename, 'exec'), namespace)

  File 
"/home/comp/Apps/Python/Molecular_Transforms/Basic/MolT_app_1.py", line 
289, in 

f.write("\n".join("".join(map(str, x)) for x in (name_I_app)))

  File 
"/home/comp/Apps/Python/Molecular_Transforms/Basic/MolT_app_1.py", line 
289, in 

f.write("\n".join("".join(map(str, x)) for x in (name_I_app)))

TypeError: 'numpy.float64' object is not iterable

However, numpy.column_stack works.

Problem solved.

--
Stephen P. Molnar, Ph.D.Life is a fuzzy set
www.molecular-modeling.net  Stochastic and multivariate
(614)312-7528 (c)
Skype: smolnar1
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Re: [Tutor] Pyuthon 3 Combine 1 D Arrays

2017-05-17 Thread Alan Gauld via Tutor 
On 17/05/17 20:50, Stephen P. Molnar wrote:
> I'm beginning to think that I don't know how to ask the question as 
> Google and Stack Overflow have resulted in nothing.  All of the results 
> seem to deal with integers.

Have you tried asking on the scipy forum?

https://www.scipy.org/scipylib/mailing-lists.html

-- 
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.amazon.com/author/alan_gauld
Follow my photo-blog on Flickr at:
http://www.flickr.com/photos/alangauldphotos


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