Matlab 之 Warning: Variable 'a' cannot be saved to a MAT-file whose version is older than 7.3.

save mat文件的时候出现以下错误：

matlab错误提示：

Warning: Variable ‘a‘ cannot be saved to a MAT-file whose version

is older than 7.3.

To save this variable, use the -v7.3 switch.

Skipping...

解决办法：

1、打开matlab，file/preferences，general选项卡-MAT-Files,选择第一个。

2、save -v7.3 TrainData.mat trainPatches

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Matlab 之 Warning: Variable 'a' cannot be saved to a MAT-file whose version is older than 7.3.