matlab脚本判断两个文件夹更新时间前后

可以通过以下步骤实现：

1. 使用 `dir` 函数获取文件夹的属性信息，包括文件夹名称、更新时间等。

folder1 = 'path/to/folder1';
folder2 = 'path/to/folder2';

folder1_info = dir(folder1);
folder2_info = dir(folder2);

2. 使用 `datenum` 函数将更新时间转换为 MATLAB 内部的日期格式，方便进行比较。

folder1_time = datenum(folder1_info.date);
folder2_time = datenum(folder2_info.date);

3. 比较更新时间，判断哪个文件夹更新时间更早（即更新时间更小）。

if folder1_time < folder2_time
    disp('Folder 1 was updated before Folder 2.');
elseif folder1_time > folder2_time
    disp('Folder 2 was updated before Folder 1.');
else
    disp('Folder 1 and Folder 2 were updated at the same time.');
end

完整代码示例：

folder1 = 'path/to/folder1';
folder2 = 'path/to/folder2';

folder1_info = dir(folder1);
folder2_info = dir(folder2);

folder1_time = datenum(folder1_info.date);
folder2_time = datenum(folder2_info.date);

if folder1_time < folder2_time
    disp('Folder 1 was updated before Folder 2.');
elseif folder1_time > folder2_time
    disp('Folder 2 was updated before Folder 1.');
else
    disp('Folder 1 and Folder 2 were updated at the same time.');
end