잠토의 잠망경

nonzero array중 0 이 아닌 index를 얻고자할때 사용한다. 1차원 import numpy as np a = np.array([0,1,2,3,4,5,0,1,2,3,4]) nonzeroList = a.nonzero() print(nonzeroList) #[1,2,3,4,5,7,8,9,10], dtype=int64 2차원 import numpy as np b = np.array([0,1,2,3,0],[0,1,2,3,0]) print(b.nonzero()) # [0,0,0,1,1,1] # [1,2,3,1,2,3] print(np.transpose(b.nonzero())) # merge