how to append rows to a numpy matrix

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Alonso
08 Oct 2016
1import numpy as np    
2arr = np.empty((0,3), int)
3print("Empty array:")
4print(arr)
5arr = np.append(arr, np.array([[10,20,30]]), axis=0)
6arr = np.append(arr, np.array([[40,50,60]]), axis=0)
7print("After adding two new arrays:")
8print(arr)
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Luca
31 Feb 2017
1import numpy as np    
2arr = np.empty((0,3), int)
3print("Empty array:")
4print(arr)
5arr = np.append(arr, np.array([[10,20,30]]), axis=0)
6arr = np.append(arr, np.array([[40,50,60]]), axis=0)
7print("After adding two new arrays:")
8print(arr)
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