Jul 12, 2011 · Matrix operations in numpy most often use an array type with two dimensions. There are many ways to create a new array; one of the most useful is the zeros function, …

If you wish to combine two 10 element one-dimensional arrays into a two-dimensional array, np.vstack((tp, fp)).T will do it. np.vstack((tp, fp)) will return an array of shape (2, 10), and the T …

@codemuncher The reason that [[0] * col] * row doesn't do what you want is because when you initialize a 2d list that way, Python will not create distinct copies of each row. Instead it will init …

Sep 25, 2012 · I want to convert a 1-dimensional array into a 2-dimensional array by specifying the number of columns in the 2D array. Something that would work like this: > import numpy …

In Python one would usually use lists for this purpose. Lists can be nested arbitrarily, thus allowing the creation of a 2D array. Not every sublist needs to be the same size, so that solves your …

Oct 3, 2009 · @AndersonGreen As I said there's no such thing as a variable declaration in Python. You would create a multidimensional list by taking an empty list and putting other lists …

Jun 30, 2011 · X is a 2D array. I want to have a new variable Y that which has the same value as the array X.Moreover, any further manipulations with Y should not influence the value of the X.

There is no array type in python, but to emulate it we can use lists. I want to have 2d array-like structure filled in with zeros. My question is: what is the difference, if any, in this two …

Jul 20, 2015 · I'm trying to generate a 2d numpy array with the help of generators: x = [[f(a) for a in g(b)] for b in c] And if I try to do something like this: x = np.array([np.array([f(a) for a in g(b)]) …

Mar 16, 2018 · Is there a built-in function to join two 1D arrays into a 2D array? Consider an example: X=np.array([1,2]) y=np.array([3,4]) result=np.array([[1,3],[2,4]]) I can think of 2 simple …