Let's say I have the following NumPy arrays:
i = array([2, 4, 5])
j = array([0, 1, 2])
I would like to have a very efficient method (built-in if possible) to sum those vectors and have an output that looks like this:
[[2 4 5]
[3 5 6]
[4 6 7]]
So basically each column is the array j to which the k th element of i has been added (k = 0, 1, 2 in this case)
See Question&Answers more detail:
os 与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…