In Python, I have an ndarray y that is printed as array([0, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1]) I’m trying to count how many...
What is the most efficient way to map a function over a numpy array? The way I’ve been doing it in my current project is as follows: import numpy...
I know there is a method for a Python list to return the first index of something: >>> l = [1, 2, 3] >>> l.index(2) 1 Is there something...
Suppose I have: test = numpy.array([[1, 2], [3, 4], [5, 6]]) test[i] gets me ith line of the array (eg [1, 2]). How can I access the ith column?...
A numpy matrix can be reshaped into a vector using reshape function with parameter -1. But I don’t know what -1 means here. For example: a = numpy.matrix([[1, 2,...
I am interested in knowing how to convert a pandas dataframe into a NumPy array. dataframe: import numpy as np import pandas as pd index = [1, 2, 3,...
NumPy proposes a way to get the index of the maximum value of an array via np.argmax. I would like a similar thing, but returning the indexes of the...
Is there a way to dump a NumPy array into a CSV file? I have a 2D NumPy array and need to dump it in human-readable format. 1Best Answer...
I have two points in 3D: (xa, ya, za) (xb, yb, zb) And I want to calculate the distance: dist = sqrt((xa-xb)^2 + (ya-yb)^2 + (za-zb)^2) What’s the best...
When I print a numpy array, I get a truncated representation, but I want the full array. Is there any way to do this? Examples: >>> numpy.arange(10000) array([ 0,...