[Numpy-discussion] ValueError: objects are not aligned
Rui DaCosta
ruidc at yahoo.com
Wed Sep 8 08:08:20 EDT 2010
Thanks for your assistance,
I was following this example:
http://www.scipy.org/Numpy_Example_List#head-779283aaa3cc20a3786ad33c2ee1fee9d68a4a53
I intend to use different arrays once I have resolved this problem.
Trying your suggestion:
...
print (rf1)
print (np.corrcoef(rf1, rf1, rowvar=0))
results in:
[[-0.00641625]
[-0.00498411]
[-0.0038015 ]]
[[ 1. 1.]
[ 1. 1.]]
which should have been a 3x3 matrix
as for "stacking rf1 rf1 into a single array first" how would I do this?
Regards,
Rui
________________________________
From: "josef.pktd at gmail.com" <josef.pktd at gmail.com>
To: Discussion of Numerical Python <numpy-discussion at scipy.org>
Sent: Wed, September 8, 2010 1:09:46 PM
Subject: Re: [Numpy-discussion] ValueError: objects are not aligned
On Wed, Sep 8, 2010 at 5:42 AM, RuiDC <ruidc at yahoo.com> wrote:
>
> I'm getting this error, which must be a simple error in getting the result
> from the cursor in the right shape, how do I get the cursor into the array
> as a single dimension?:
>
> import numpy as np
> import sqlite3
> conn = sqlite3.connect("simpledb")
> cursor1 = conn.execute("select LogReturn from tblReturns limit 3")
> rf1 = np.asarray(cursor1.fetchall(), dtype=np.float64)
> print (rf1)
> print (np.corrcoef([rf1, rf1]))
numpy.corrcoef(x, y=None, rowvar=1, bias=0)
try
np.corrcoef(rf1, rf1, rowvar=0) no [ ]
or
stacking rf1 rf1 into a single array first
Josef
>
> result:
> [[-0.00641625]
> [-0.00498411]
> [-0.0038015 ]]
> Traceback (most recent call last):
> File "C:\Documents and Settings\rui\workspace\numpytest\src\numpytest.py",
> line 38, in <module>
> print (np.corrcoef([rf1, rf1]))
> File "C:\Python26\lib\site-packages\numpy\lib\function_base.py", line
> 2003, in corrcoef
> c = cov(x, y, rowvar, bias, ddof)
> File "C:\Python26\lib\site-packages\numpy\lib\function_base.py", line
> 1953, in cov
> return (dot(X, X.T.conj()) / fact).squeeze()
> --
> View this message in context:
>http://old.nabble.com/ValueError%3A-objects-are-not-aligned-tp29641661p29641661.html
>
> Sent from the Numpy-discussion mailing list archive at Nabble.com.
>
> _______________________________________________
> NumPy-Discussion mailing list
> NumPy-Discussion at scipy.org
> http://mail.scipy.org/mailman/listinfo/numpy-discussion
>
_______________________________________________
NumPy-Discussion mailing list
NumPy-Discussion at scipy.org
http://mail.scipy.org/mailman/listinfo/numpy-discussion
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/numpy-discussion/attachments/20100908/e7b5c751/attachment.html>
More information about the NumPy-Discussion
mailing list