May 21, 2011 · import numpy as np a = np.asarray([ [1,2,3], [4,5,6], [7,8,9] ]) a.tofile('foo.csv',sep=',',format='%10.5f') The man page has some useful notes: This is a …

Sep 21, 2008 · If you are creating a 1d array in Python, is there any benefit to using the NumPy package?

7 Using pygame, you can open a window, get the surface as an array of pixels, and manipulate as you want from there. You'll need to copy your numpy array into the surface array, however, …

Apr 2, 2010 · How do I find the nearest value in a numpy array? Example: np.find_nearest(array, value)

x = x[~numpy.isnan(x)] Explanation The inner function numpy.isnan returns a boolean/logical array which has the value True everywhere that x is not-a-number. Since we want the …

Dec 24, 2016 · When one wants to count all values in an array, np.unique() is more performant than a solution implemented manually with Numba for sufficiently large arrays. EDIT: It seems …

Jun 12, 2012 · Using np.delete is the fastest way to do it, if we know the indices of the elements that we want to remove. However, for completeness, let me add another way of "removing" …

Jan 11, 2009 · I know there is a method for a Python list to return the first index of something: >>> xs = [1, 2, 3] >>> xs.index (2) 1 Is there something like that for NumPy arrays?

May 5, 2011 · I need to create a NumPy array of length n, each element of which is v. Is there anything better than: a = empty(n) for i in range(n): a[i] = v I know zeros and ones would work …

Nov 2, 2012 · Use df.to_numpy() It's better than df.values, here's why. * It's time to deprecate your usage of values and as_matrix(). pandas v0.24.0 introduced two new methods for obtaining …