ndarray的大小何时不固定? [英] When is the size of an ndarray not fixed?

问题描述

numpy.ndarray文档指出:

ndarray是一个(通常为固定大小)多维容器，其中包含相同类型和大小的项目.

An ndarray is a (usually fixed-size) multidimensional container of items of the same type and size.

我对这里的形容词通常感到惊讶.我认为ndarray始终是固定大小的.何时ndarray的大小不固定?

I'm surprised by the adjective usually here. I thought an ndarray is always of a fixed size. When is the size of an ndarray not fixed?

推荐答案

您可以重塑尺寸，因此内存本身是固定大小的，但是可以调整形状(因此可能无法固定)尺寸).

You are allowed to reshape the dimensions, so the memory itself is fixed-sized, but the way you shape it may be adapted (hence it may not be fixed dimensions).

您可以使用resize调整数组的大小，但这基本上是一个新数组.

You can resize the array with resize, but it's basically a new array.

这篇关于ndarray的大小何时不固定?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！