I want to create an empty array and append items to it, one at a time. xs = [] for item in data: xs.append(item) Can I use this list-style notation with NumPy arrays?

Aug 18, 2016 · I have 2 numpy arrays: aa = np.random.rand(5,5) bb = np.random.rand(5,5) How can I create a new array which has a value of 1 when both aa and bb exceed 0.5?

@senderle if an array is with object dtype, then np.fromstring(arr.tostring()) will fail with numpy Cannot create an object array from a string. Any ideas to solve this?

Oct 17, 2017 · You do have the standard array lib in Python which, for all intents and purposes, is a dynamic array. As for the specific behavior you gave to insert I doubt it to be valid (in other …

May 29, 2021 · In my homework, numpy usage wasn't allowed but I realize that just now. I have to delete all the np.array() components and define an array without using them. I couldn't find a …

Jul 20, 2015 · what do f(a) and g(b) do exactly? If they produce numbers, your code should work: that is the correct way to initialize a 2d numpy array (numpy is generally smart enough to cast …

If you are using single precision floats, this would be A.view(dtype=np.complex64) Here is a fuller example import numpy as np from numpy.random import rand # Randomly choose real and …

This solution is dangerous, in that a general user might assume that the resulting steps will always be as specified. However, consider the function with linspace(9.5, 11.6, step=.5) and the …

Aug 5, 2011 · I wanna create some array in python of array of specified dimension of specific type initialized with same value. i can use numpy arrays of specific size but I am not sure how to …

Apr 12, 2012 · I want to be able to 'build' a numpy array on the fly, I do not know the size of this array in advance. For example I want to do something like this: a= np.array() for x in y: …