numpy Archives - Page 11 of 11

How to count the occurrence of certain item in an ndarray?

In Python, I have an ndarray y that is printed as array([0, 0, 0, 1, 0, 1, 1, 0, 0, 0, 0, 1]) … Read more

What is the most efficient way to map a function over a numpy array? The way I’ve been doing it in my current … Read more

I know there is a method for a Python list to return the first index of something: >>> l = [1, 2, 3] … Read more

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 … Read more

A numpy matrix can be reshaped into a vector using reshape function with parameter -1. But I don’t know what -1 means here. … Read more

I am interested in knowing how to convert a pandas dataframe into a NumPy array. dataframe: import numpy as np import pandas as … Read more

NumPy proposes a way to get the index of the maximum value of an array via np.argmax. I would like a similar thing, … Read more

Is there a way to dump a NumPy array into a CSV file? I have a 2D NumPy array and need to dump … Read more

I have two points in 3D: (xa, ya, za) (xb, yb, zb) And I want to calculate the distance: dist = sqrt((xa-xb)^2 + … Read more

When I print a numpy array, I get a truncated representation, but I want the full array. Is there any way to do … Read more