numpy数组，插入零的交替行 [英] Numpy array, insert alternate rows of zeros

问题描述

我正在尝试通过在每行之后添加零行来修改NumPy数组.我的矩阵有491行，最后我应该有982行的矩阵.我尝试使用np.repeat，np.tile等多种方法，但无济于事.

I am trying to modify a NumPy array by adding a row of zeros after each row. My matrix has 491 rows and I should end up with a matrix that has 982 rows. I tried multiple ways using np.repeat, np.tile and so on to no avail.

有人可以帮助我解决这个问题吗?

Can anyone help me with this issue?

推荐答案

您可以通过首先初始化982行数组，然后填充备用行来实现此目的，例如(5列):

You could do this by initialising a 982-row array first and then filling alternate rows, for example (5 columns):

a=np.zeros((982,5)) 
b=np.random.randint(0,100,(491,5)) # your 491 row matrix
a[::2] = b

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