Open jangjusung opened 2 years ago
arr =np.empty((8,4)) for i in range(8): arr[i]=i arr
arr[[4,3,0,6]] arr[[-3,-5,-7]] arr=np.arange(32).reshape((8,4)) arr arr[[1,5,7,2],[0,3,1,2]] arr[[1,5,7,2]][:,[0,3,1,2]] arr[[1,2,3,4],[0,1,2,3]]
arr.T #행과 열 변경 np.dot(arr.T,arr) #행열의 곱 np.dot(arr,arr.T)
arr =np.empty((8,4)) for i in range(8): arr[i]=i arr
arr[[4,3,0,6]] arr[[-3,-5,-7]] arr=np.arange(32).reshape((8,4)) arr arr[[1,5,7,2],[0,3,1,2]] arr[[1,5,7,2]][:,[0,3,1,2]] arr[[1,2,3,4],[0,1,2,3]]
arr.T #행과 열 변경 np.dot(arr.T,arr) #행열의 곱 np.dot(arr,arr.T)