标签：numpy

NumPy提出了一种获取数组最大值索引的方法np.argmax。 我想要一个类似的东西，但返回N最大值的索引。 例如，如果我有一个数组，[1, 3, 2, 4, 5]，function(array, n=3)将返回的索引[4, 3, 1]相对应的元素[5, 4, 3]。 [1]: import numpy as np In [2]: arr = np.array([1, 3, 2, 4, 5]) In [3]: arr.argsort()[-3:][::-1] Out[3]: array([4, […]

问题内容: I am trying to populate a numpy array based on a dictionary of values. My dictionary looks like this: A = {(12, 15): 4, (532, 31): 7, (742, 1757): 1, …} I am trying to populate the array so that (using my above example) 4 is at the index […]

问题内容: I need to perform matrix multiplication on two 4D arrays (m & n) with dimensions of 2x2x2x2 and 2x3x2x2 for m & n respectively, which should result in a 2x3x2x2 array. After a lot of research (mostly on this site) it seems this can be d […]