如何在Matlab中创建.mat文件? [英] How to create a .mat file in Matlab?

问题描述

我的文件夹中有25张图像，我想为路标识别系统制作一个 .mat 文件.

I have 25 images in a folder and I want to make a .mat file for a road-sign recognition system.

在Matlab中制作.mat文件的步骤是什么?

What are the steps for making a .mat file in Matlab?

推荐答案

对于图像可能有更好的方法，但这就是我所知道的.如果要控制 .mat 文件中的内容，则可以使用

There may be a better approach for images but here is what I know. If you want to control what goes into the .mat file you can specify what variables in your workspace will be saved using the save command.

% MATLAB R2017a
X = rand(273,273);
Y = rand(273,273);
Z = rand(273,273);

save FileName X Y Z

这将创建文件 FileName.mat .
您可以使用 load 命令访问内容.

This creates a file FileName.mat.
You can access the contents using the load command.

clear
load FileName

要将工作空间中的所有内容保存到 .mat 文件，请使用 save 命令，但未指定要保存的变量(MATLAB随后将全部保存).

To save everything in the workspace to a .mat file, use the save command without specifying the variables to save (MATLAB will then save them all).

W = rand(273,273);
save FileName

有关更多选项和示例，请参见链接的文档.

See the linked documentation for more options and examples.

这需要您遍历文件夹中的图像.一种直接的方法是使用索引j其中filepath = 'C:\Users\user1\Folder\ImageFolder\'的[filepath 'image' num2str(j) '.jpg']循环直接加载图像.这使用字符串连接和 num2str 命令.

This requires you to loop through the images in the folder. A direct approach to this is directly loading the images using a loop over [filepath 'image' num2str(j) '.jpg'] with index j where filepath = 'C:\Users\user1\Folder\ImageFolder\'. This uses string concatenation and the num2str command.

如果您需要在脚本中更改当前目录，请 功能很有用.

If you need to change your current directory within the script,the cd function is useful.

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