将值插入到空的多维中. numpy数组 [英] Inserting values to an empty multidim. numpy array

问题描述

我需要创建一个形状为(?, 10, 10, 3)的空numpy数组. ?表示我不知道要插入多少个元素.然后，我想将许多形状为(1, 10, 10, 3)的numpy数组一一插入到准备好的数组中，因此?标记将随着插入的元素而增加.

I need to create an empty numpy array of a shape (?, 10, 10, 3). ? means I don't know how many elements will be inserted. Then I have many numpy arrays of a shape (1, 10, 10, 3) which I want to be inserted to the prepared array one by one, so the ? mark will be increasing with inserted elements.

我正在尝试numpy数组方法的所有变体，例如empty，insert，concatenate，append ...，但是我无法实现.你能帮我个忙吗?

I'm trying all variations of numpy array methods like empty, insert, concatenate, append... but I'm not able to achieve this. Could you please give me a hand with this?

推荐答案

使用

Using np.append works:

import numpy as np

mat = np.empty((0,10,10,3))

array = np.random.rand(1,10,10,3)

mat = np.append(mat, array, axis=0)
mat = np.append(mat, array, axis=0)

print(mat.shape)

>>>(2,10,10,3)

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