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Questions tagged numpy

308 questions · page 2 of 7

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15
votes
3
answers

In numpy, what does indexing an array with the empty tuple vs. ellipsis do?

python arrays numpy indexing
asked 2013-02-04T14:51:41.540
58
votes
10
answers

NumPy first and last element from array

python arrays numpy
asked 2013-01-30T17:10:18.183
8
votes
0
answers

Using Numpy with ARM processors

python numpy arm
asked 2013-01-29T20:00:02.990
8
votes
3
answers

Grayscale image to NumPy array for Fourier transform

python image-processing numpy python-imaging-library fft
asked 2013-01-29T06:35:16.463
14
votes
5
answers

Using numpy to efficiently convert 16-bit image data to 8 bit for display, with intensity scaling

python image image-processing numpy
asked 2013-01-22T17:25:42.850
9
votes
1
answers

Python package to estimate Perron-Frobenius Eigenvalue of real, square, non-negative matrix

python numpy scipy sparse-matrix
asked 2013-01-22T03:11:43.427
48
votes
3
answers

Is there a convenient way to apply a lookup table to a large array in numpy?

arrays numpy python-2.x lookup-tables
asked 2013-01-21T23:01:40.350
16
votes
2
answers

How to vectorize this python code?

python numpy vectorization
asked 2013-01-21T21:22:19.443
9
votes
3
answers

Can I rename fields in a numpy record array

python numpy matplotlib
asked 2013-01-20T22:20:20.300
10
votes
2
answers

unsupported operand type(s) for *: 'numpy.ndarray' and 'numpy.float64'

python numpy operand
asked 2013-01-18T21:42:46.830
14
votes
3
answers

python pandas custom agg function

python numpy pandas
asked 2013-01-09T21:27:11.447
9
votes
1
answers

Python throws TypeError on issubclass() when issubclass() is never called

python numpy python-2.7
asked 2013-01-02T19:51:35.697
10
votes
1
answers

Summing over pair of indices (or more) in Python

python numpy sum
asked 2012-12-27T00:15:00.613
9
votes
1
answers

How to convert the time zone of the values of a Pandas Series

datetime numpy timezone pandas
asked 2012-12-22T16:34:15.983
9
votes
3
answers

Make the sum of integers in a matrix maximal by multiplying rows and columns by -1

python algorithm numpy python-3.x
asked 2012-12-20T21:53:11.020
12
votes
5
answers

How to save numpy masked array to file

python numpy
asked 2012-12-14T10:42:19.037
15
votes
2
answers

How do I approximate the Jacobian and Hessian of a function numerically?

numpy scipy numerical
asked 2012-12-13T08:19:09.253
25
votes
2
answers

What is the fastest way to slice a scipy.sparse matrix?

python numpy scipy sparse-matrix
asked 2012-12-12T15:43:51.247
20
votes
4
answers

Matplotlib: Color-coded text in legend instead of a line

python numpy matplotlib plot legend
asked 2012-12-11T20:46:42.403
14
votes
2
answers

Finding the indices of the top three values via argmin() or min() in python/numpy without mutation of list?

python list numpy min
asked 2012-12-08T23:33:16.087
10
votes
2
answers

How do I get wider numpy array print output?

python arrays printing numpy
asked 2012-12-08T03:10:35.660
20
votes
3
answers

Trailing delimiter confuses pandas read_csv

python pandas numpy csv delimiter
asked 2012-12-05T09:29:44.010
12
votes
1
answers

limit how much data is read with numpy.genfromtxt for matplotlib

python numpy matplotlib
asked 2012-12-01T21:04:15.910
57
votes
1
answers

How to use numpy.where with logical operators

python numpy where-clause logical-operators
asked 2012-11-27T17:10:18.703
26
votes
6
answers

Replace values of a numpy index array with values of a list

python numpy indexing
asked 2012-11-26T20:17:17.487
90
votes
6
answers

How to calculate the sum of all columns of a 2D numpy array (efficiently)

python numpy
asked 2012-11-26T14:55:05.183
14
votes
4
answers

Python lists/arrays: disable negative indexing wrap-around in slices

python arrays list numpy slice
asked 2012-11-16T04:47:04.343
33
votes
4
answers

Elegant grid search in python/numpy

python numpy
asked 2012-11-13T23:18:17.383
11
votes
2
answers

2D numpy array does not give an error when indexing with strings containing digits

python numpy indexing
asked 2012-10-31T12:55:17.380
11
votes
1
answers

How do I split an ndarray based on array of indexes?

python numpy
asked 2012-10-26T19:00:12.487
10
votes
5
answers

How to plot line (polygonal chain) with numpy/scipy/matplotlib with minimal smoothing

python numpy matplotlib scipy spline
asked 2012-10-17T13:11:00.217
52
votes
2
answers

numpy unique without sort

python numpy
asked 2012-10-17T03:58:57.333
8
votes
3
answers

Reliable way to get the "build" directory from within setup.py

python numpy setuptools distutils setup.py
asked 2012-10-15T13:13:33.600
149
votes
3
answers

float64 with pandas to_csv

python numpy pandas
asked 2012-10-13T21:31:34.397
14
votes
1
answers

Weighted moving average with numpy.convolve

python math numpy
asked 2012-10-10T09:22:14.227
9
votes
2
answers

Linear regression - reduce degrees of freedom

python numpy statistics pandas curve-fitting
asked 2012-09-30T19:58:30.657
11
votes
5
answers

Slicing numpy array with another array

python arrays numpy slice
asked 2012-09-25T19:38:55.180
19
votes
1
answers

What does matplotlib `imshow(interpolation='nearest')` do?

python image-processing numpy matplotlib
asked 2012-09-18T08:52:52.363
29
votes
2
answers

Creating a 3D plot from a 3D numpy array

python numpy matplotlib matplotlib-3d
asked 2012-09-13T20:53:10.237
9
votes
3
answers

Alternative to Scipy mode function in Numpy?

numpy scipy frequency mode
asked 2012-09-13T03:43:11.060
8
votes
2
answers

From tick by tick data to candlestick

python numpy scipy finance pandas
asked 2012-09-07T17:38:32.373
32
votes
6
answers

Efficient way to normalize a Scipy Sparse Matrix

python numpy scipy sparse-matrix
asked 2012-09-06T17:06:03.517
8
votes
1
answers

Numpy C API: Link several object files

python c gcc numpy
asked 2012-09-03T19:59:47.803
9
votes
1
answers

splitting a sparse matrix into two

python numpy scipy sparse-matrix
asked 2012-08-31T10:49:01.080
25
votes
2
answers

Efficiently rotate a set of points with a rotation matrix in numpy

python numpy rotation vectorization
asked 2012-08-27T19:30:57.667
9
votes
1
answers

Unable to load a previously dumped pickle file of large size in Python

python numpy networkx pickle
asked 2012-08-21T18:32:11.880
10
votes
1
answers

numpy FloatingPointError: invalid value encountered in subtract - not reproducible?

python numpy
asked 2012-08-20T17:08:20.430
13
votes
4
answers

Theano fails due to NumPy Fortran mixup under Ubuntu

numpy scipy gfortran theano
asked 2012-08-16T12:39:30.310
20
votes
3
answers

Find the set difference between two large arrays (matrices) in Python

python numpy set-difference
asked 2012-08-10T13:50:25.847
22
votes
2
answers

Matlab vs Python: Reshape

python matlab matrix numpy scipy
asked 2012-08-09T21:39:54.363
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