Category "numpy"

Is there something like np.linspace for 3D lines?

I have a 3x1 point vector representing the start point of some line, and a 3x1 point vector representing the end of some line. I would like to sample an arbitra

Plot Cassini ovals in Python using numpy and matplotlib

I am trying to plot Cassini ovals in Python using these parametric equations for x,y. https://mathcurve.com/courbes2d.gb/cassini/cassini.shtml Here is my progra

Combinations divided into rows with no repetition of elements

I'm working with lists in Python. I have a list of colleagues which is colleagues=['Jack', 'Jessica' 'John', 'Mark', 'Mary', 'Paul'] I want to calculate all po

Matlab wrapToPi and python np.unwrap

I am trying to port my code from Matlab to Python. Most of it seems to work except Matlab's function wrapToPi I am using numpy's unwrap function np.unwrap

"RuntimeError: implement_array_function method already has a docstring", trying to import numpy. How do I solve this?

I am trying to run a script importing numpy, and it shows this error: Traceback (most recent call last): File "C:/Users/<user>/pycharm/<my_project>

The dimension orders of the Numpy 3D array are designed to z, x, y. Are there any advantages?

I think that the x,y,z order is more intuitive for a 3D array, just as Matlab does. For example, If someone tells me an array is 2x3x4, I will think it is 2 row

Trying to replace part of array to another array, get error ValueError: assignment destination is read-only

I have two arrays with pixels, I need to replace the first part of array 'pixels_new', to array 'pixels_old' pixels_old = numpy.asarray(im) #picture 100X100 pix

Intersect float rows in two numpy matrices with precision

I'm looking for rows in B which are close to any of the rows in A example: eps = 0.1 A = [[1.22, 1.33], [1.45, 1.66]] B = [[1.25, 1.34], [1.77, 1.66], [1.44, 1.

Pandas Pivot table - How compute the following default ratio?

I am able to compute the default rate in number (e.g, the percentage of customers falled into default), with the code below, getting the following output: impor

How to generate a sphere in 3D Numpy array

Given a 3D numpy array of shape (256, 256, 256), how would I make a solid sphere shape inside? The code below generates a series of increasing and decreasing ci

Pythonic way to get both diagonals passing through a matrix entry (i,j)

What is the Pythonic way to get a list of diagonal elements in a matrix passing through entry (i,j)? For e.g., given a matrix like: [1 2 3 4 5] [6 7 8

Python-AttributeError: 'int' object has no attribute 'decode'" when trying to call the GML file on NetworkX

Premise・What I want to achieve I'm going to use Python to read the GML file. Error Message Traceback (most recent call last): File "firstgml.py", line

Vectorize a function for a GroupBy Pandas Dataframe

I have a Pandas dataframe sorted by a datetime column. Several rows will have the same datetime, but the "report type" column value is different. I need to se

Change 1's to 0 and 0's to 1 in numpy array without looping

Let's say I have a numpy array where I would like to swap all the 1's to 0 and all the 0's to 1 (the array will have other values, and there is nothing special

Fastest way in numpy to get distance of product of n pairs in array

I have N number of points, for example: A = [2, 3] B = [3, 4] C = [3, 3] . . . And they're in an array like so: arr = np.array([[2, 3], [3, 4], [3, 3]]) I nee

Sliding window input (image sequence) for convolutional neural network

I am currently trying to feed an image sequence as a single input entity to my CNN. I found the numpy utility numpy.lib.stride_tricks.sliding_window_view My ima

Mypy in Nox session not finding Nump type stubs

My nox session is defined like: @nox.session(python=["3.10", "3.9.10"]) def mypy(session: Session) -> None: args = session.posargs or locations insta

How to efficiently compute the heat map of two Gaussian distribution in Python?

I am trying to produce a heat map where the pixel values are governed by two independent 2D Gaussian distributions. Let them be Kernel1 (muX1, muY1, sigmaX1, si

Integer out of range when inserting large number of rows to postgress

I have tried multiple solutions and way around to solve this issue, probably something is still I am missing. I want to insert a list of values to my database.

How to append np.arrays() in a for-loop?

This application is in analysis of astrophysical data, but the problem is purely a question of programming/syntax. I want to go through my 53 bins of data (each