All Questions
102,308 questions
1
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Numpy Concatenate Replacing Previous Data in Array
I am trying to write code that produces a deck of cards. The deck is a 2D array that contains each card as an array. Each card array contains its card value as well as its suit, represented by the ...
- 21
0
votes
1
answer
15
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Getting ImportError when importing Numpy into VSCode on a Mac
When I run import numpy on my Mac's VS Code environment, I get the following error. Can anyone help me navigate through this to resolve it? Pasting below the full traceback.
>>> import numpy
...
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0
answers
33
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Numpy vectorized version of my deterministic Python function returns different set of values than the one created with normal list comprehension [duplicate]
In the following runnable Python program the arrays values and check_values contain different elements. On my machine the complete output is the following:
Received k = 0, generating value n = 0; 3k &...
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-4
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0
answers
63
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Regex logic in numpy/torch [closed]
Morning,
This is a kinda 'open question'.
Is there a way to find number sequences, following certain pattern, in a numpy/torch array in a similar way as a regex works?
Let's say i wanna find all ...
- 1,568
-2
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0
answers
60
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Potential benefits from enforced vectorization - Numba [closed]
I am trying to see how can I improve the computational performance of this function that I am using in python. I am using numba with nopython mode and in general, I observe some small benefit in ...
- 1
0
votes
1
answer
46
views
Cannot load databricks in my container because of numpy import error
I have a fairly simple Docker file to deploy on Lambda
FROM public.ecr.aws/lambda/python:3.9
COPY requirements.txt .
RUN pip install -r requirements.txt --target "${LAMBDA_TASK_ROOT}"
COPY ...
- 89
0
votes
0
answers
67
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Weird memory allocation and freeing with Numpy
So I have been tracking this weird memory leak in my Python repo for a while now. Finally I was able to isolate the problem using the code below. The numpy arrays are generating data with a similar ...
- 179
2
votes
1
answer
69
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How to compute elementwise dot product of two 2D NumPy arrays [duplicate]
This script:
import numpy as np
a = np.array([[0, 1], [1, 1], [1, 0]])
b = np.array([[1, 0], [1, 1], [1, -1]])
dot = a[:, 0]*b[:, 0] + a[:, 1]*b[:, 1]
print(dot)
produces elementwise dot product of ...
- 8,265
1
vote
1
answer
163
views
Create all possible outcomes from numpy matrices that show disjoints and subsets
Let's assume there is an event and within this event there are multiple outcomes that can co-exist.
An example would be a tennis game where A plays against B and B serves. A couple of possible ...
- 395
-2
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0
answers
22
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Why does the build_model-function in mpi-sppy not work? [closed]
Could someone please help me understand the error in my code? I based it on the farmer example from the link provided, but I’m unable to figure out why the model isn’t being created. I have noted the ...
3
votes
0
answers
94
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numpy.load() seems to use double the memory of the array at peak
I thought numpy.load() writes directly into the array data memory.
However, the results of the profiling functions (I profiled with memray and mprof) seems a bit strange to me...
My array is 2GB big. ...
- 476
1
vote
1
answer
80
views
Why does np.fromfile fail when reading from a pipe?
In a Python script, I've written:
# etc. etc.
input_file = args.input_file_path or sys.stdin
arr = numpy.fromfile(input_file, dtype=numpy.dtype('f32'))
when I run the script, I get:
$ cat nums.fp32....
- 133k
1
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0
answers
30
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gdal_array can't be imported in Python-GDAL
Ok, so, I'm trying to process some .bil files in Debian 12
I installed GDAL using:
sudo apt install gdal-bin
sudo apt-get install libgdal-dev
And ogrinfo --version outputs:
GDAL 3.6.2, released 2023/...
- 49
-1
votes
0
answers
77
views
How do I do Eigen decomposition of a generalized Fibonacci matrix to arbitrary precision?
This is a follow up to my previous question.
I want to efficiently compute Nth term of higher order generalized Fibonacci numbers, N is sufficiently large such that the Nth term is guaranteed to be ...
- 3,834
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63
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Why doesn’t the barycenter method detect subpixel displacements where correlation does?
I’m working with X-ray imaging data.
I have a reference image containing a structured pattern, and a sample image where this pattern is slightly distorted due to the presence of a physical sample.
My ...
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