numpy Questions
2
Solved
I have player A and B who both played against different opponents.
player
opponent
days ago
A
C
1
A
C
2
A
D
10
A
F
100
A
F
101
A
F
102
A
G
1
B
C
1
B
C
2
B
D
10
B
F
100
...
4
Solved
(my2022) C:\Users\donhu>pip3 install torch torchvision torchaudio --extra-index-url https://download.pytorch.org/whl/cu113
Looking in indexes: https://pypi.org/simple, https://download.pytorch.o...
Earthshine asked 24/4, 2022 at 8:18
5
I was trying to install numpy version 1.22.3 on a M1 Macbook with pip3, and pip3 says the package is present, but when I try to import the module, an error gets thrown at me that says
Importing the...
Ratable asked 5/4, 2022 at 3:2
3
Solved
Looks like numpy is using deprecated function DataFrame.swapaxes in fromnumeric.py.
Anaconda3\lib\site-packages\numpy\core\fromnumeric.py:59: FutureWarning: 'DataFrame.swapaxes' is deprecated and w...
4
Solved
I know how to solve A.X = B by least squares using Python:
Example:
A=[[1,1,1,1],[1,1,1,1],[1,1,1,1],[1,1,1,1],[1,1,0,0]]
B=[1,1,1,1,1]
X=numpy.linalg.lstsq(A, B)
print X[0]
# [ 5.00000000e-01 5....
Agrarian asked 25/11, 2014 at 13:58
2
The following two functions logically do the same thing, but func2, which stores the result in a temporary variable, is slower.
def func1(a):
return a.astype(np.float64) / 255.0
def func2(a):
t...
Puentes asked 27/7 at 16:26
2
Solved
In this question I asked the community about how scipy.interpolate.splev calculates a spline basis.. My goal was to compute a spline faster then splev by pre-calculating a bspline basis and generat...
4
i am trying to crop out the faces from instagram avatars by first detecting the faces and then resizing the image. i am reading all the images which have been stored in a dataframe and then creatin...
Loutitia asked 13/2, 2018 at 10:25
4
Solved
I have a symmetric matrix represented as a numpy array, like the following example:
[[ 1. 0.01735908 0.01628629 0.0183845 0.01678901 0.00990739 0.03326491 0.0167446 ]
[ 0.01735908 1. 0.0213712 0....
5
Solved
Lets say I have the following matrix:
A = np.array([
[1,2,3],
[4,5,6],
[7,8,9]])
How can I extract the upper triangle matrix without the diagonal efficiently?
The output would be the follow...
3
Solved
I have a symmetric square DataFrame in pandas:
a = np.random.rand(3, 3)
a = (a + a.T)/2
np.fill_diagonal(a, 1.)
a = pd.DataFrame(a)
That looks like this:
0 1 2
0 1.000000 0.747064 0.357616
1 0...
3
Solved
I have a square matrix A (could be any size) and I want to take the upper triangular part and place those values in an array without the values below the center diagonal (k=0).
A = array([[ 4, 0, ...
4
Solved
Suppose I have a matrix that is 100000 x 100
import numpy as np
mat = np.random.randint(2, size=(100000,100))
I wish to go through this matrix, and if each row contains entirely either 1 or 0 I...
Buroker asked 25/6, 2019 at 15:49
4
Solved
I have an upper-triangular matrix of np.float64 values, like this:
array([[ 1., 2., 3., 4.],
[ 0., 5., 6., 7.],
[ 0., 0., 8., 9.],
[ 0., 0., 0., 10.]])
I would like to convert this into the c...
Marino asked 5/11, 2019 at 19:42
2
I am writing Python script to code for finding probability of Hypergeometric distribution. When I am using hypergeom() function in scipy, it is showing like below:
scipy.stats.distributions.rv_fro...
2
A recent immigrant to Python and scientific computing with Python. This is a question to avoid any duplication of code that might already exist.
I have a field that is sampled as a function of x a...
Conversion asked 7/12, 2012 at 23:47
2
Solved
I need to sort uint64 arrays of length 1e8-1e9, which is one of the performance bottlenecks in my current project. I have just recently updated numpy v2.0 version, in which the sorting algorithm is...
Celom asked 21/6 at 17:19
9
Solved
i'm calculating Gini coefficient (similar to: Python - Gini coefficient calculation using Numpy) but i get an odd result. for a uniform distribution sampled from np.random.rand(), the Gini coeffici...
Jewett asked 15/9, 2016 at 13:26
4
Solved
I want to do something similar to what was asked here NumPy array, change the values that are NOT in a list of indices, but not quite the same.
Consider a numpy array:
> a = np.array([0.2, 5.6...
4
Solved
I understood simple concepts about comma operator in python. For instance,
x0, sigma = 0, 0.1
means x0=0, and sigma=0.1. But I obtained a code that has a line that looks like the following.
y,...
4
Solved
I'm looking at a third-party lib that has the following if-test:
if isinstance(xx_, numpy.ndarray) and xx_.dtype is numpy.float64 and xx_.flags.contiguous:
xx_[:] = ctypes.cast(xx_.ctypes._as_par...
4
Solved
I would like to fit a 2D array by an elliptic function: (x / a)² + (y / b)² = 1 ----> (and so get the a and b)
And then, be able to replot it on my graph.
I found many examples on internet, but n...
Acrid asked 18/12, 2017 at 17:44
3
Solved
I am trying to import ArrayLike doing from numpy.typing import ArrayLike, and I get the error mentioned in the title:
ModuleNotFoundError: No module named 'numpy.typing'
I know I could simply write...
Cullen asked 16/4, 2021 at 1:10
2
Solved
Let's say I have an array of permutations perm which could look like:
perm = np.array([[0, 1, 2], [1, 2, 0], [0, 2, 1], [2, 1, 0]])
If I want to apply it to one axis, I can write something like:
v...
8
I used the following command to know the numpy version I am using
pip show numpy
output shown below
---
Name: numpy
Version: 1.8.2
Location: /usr/lib/python2.7/dist-packages
Requires:
Howev...
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