# Question: What does 3D matrix mean?

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## What are 3D matrices?

A 3D matrix is nothing but a collection (or a stack) of many 2D matrices, just like how a 2D matrix is a collection/stack of many 1D vectors. So, matrix multiplication of 3D matrices involves multiple multiplications of 2D matrices, which eventually boils down to a dot product between their row/column vectors.

## How does a 3D array work?

A 3D array is a multi-dimensional array(array of arrays). A 3D array is a collection of 2D arrays . It is specified by using three subscripts:Block size, row size and column size. More dimensions in an array means more data can be stored in that array.

## How do I view a 3D NumPy array?

Creating a 3D plot in Matplotlib from a 3D numpy arrayCreate a new figure or activate an existing figure using figure() method.Add an ~. axes. Create a random data of size=(3, 3, 3).Extract x, y, and z data from the 3D array.Plot 3D scattered points on the created axis.To display the figure, use show() method.15 May 2021