Is there a quick way to “sub-flatten” or flatten only some of the first dimensions in a numpy array? For example, given a numpy array of dimensions (50,100,25), the resultant dimensions would be (5000,25) 5 Answers 5
I have a dataframe with 2 index levels: value Trial measurement 1 0 13 1 3 2 4 2 0 NaN 1 12 3 0 34 Which I want to turn into this: Trial measurement value 1 0 13 1 1 3 1 2 4 2 0 NaN 2 1 12 3 0 34 How … Read more
Is it possible, in PHP, to flatten a (bi/multi)dimensional array without using recursion or references? I’m only interested in the values so the keys can be ignored, I’m thinking in the lines of array_map() and array_values(). 31 Answers 31 As of PHP 5.3 the shortest solution seems to be array_walk_recursive() with the new closures syntax: … Read more
import numpy as np y = np.array(((1,2,3),(4,5,6),(7,8,9))) OUTPUT: print(y.flatten()) [1 2 3 4 5 6 7 8 9] print(y.ravel()) [1 2 3 4 5 6 7 8 9] Both function return the same list. Then what is the need of two different functions performing same job. 3 Answers 3
Yes, I know this subject has been covered before (here, here, here, here), but as far as I know, all solutions, except for one, fail on a list like this: L = [[[1, 2, 3], [4, 5]], 6] Where the desired output is [1, 2, 3, 4, 5, 6] Or perhaps even better, an iterator. … Read more
I have a JavaScript array like: [[“$6”], [“$12”], [“$25”], [“$25”], [“$18”], [“$22”], [“$10”]] How would I go about merging the separate inner arrays into one like: [“$6”, “$12”, “$25”, …] 8 84
I want to flatten this list of lists: [[1, 2, 3], [4, 5, 6], [7], [8, 9]] into: [1, 2, 3, 4, 5, 6, 7, 8, 9] 2 28
