如何将 LUA Table 转换为 MATLAB MAT 文件？

我希望将 LUA 表保存为 MAT 文件。表的结构如下：

{
  1 :
    {
      bounding_box :
        {
          1 : 0.5
          2 : 0.5
          3 : 704.5
          4 : 1280.5
        }
      PatchName : "03952.jpg"
      confidence :
        {
          1 : 0.99999818651222
          2 : 1.8134877758073e-06
        }
    }
  2 :
    {
      bounding_box :
        {
          1 : 45.5
          2 : 159.5
          3 : 132.5
          4 : 216.5
        }
      PatchName : "03953.jpg"
      confidence :
        {
          1 : 0.99999864618192
          2 : 1.3538180818906e-06
        }
    }
 }

有人可以指导我如何操作吗？

我尝试了 matio.save(路径字符串，要保存的表)，但是却返回以下错误：

bad argument #1 to 'varCreate' (cannot convert 'number' to 'const char *')
stack traceback:
    [C]: in function 'varCreate'
    /home/khurram/torch/install/share/lua/5.1/matio/init.lua:136: in function '__make_var'
    /home/khurram/torch/install/share/lua/5.1/matio/init.lua:78: in function '__make_var'
    /home/khurram/torch/install/share/lua/5.1/matio/init.lua:78: in function '__make_var'
    /home/khurram/torch/install/share/lua/5.1/matio/init.lua:434: in function 'save'
    main.lua:171: in main chunk
    [C]: in function 'dofile'
    [string "_RESULT={dofile('main.lua')}"]:1: in main chunk
    [C]: in function 'xpcall'
    /home/khurram/torch/install/share/lua/5.1/trepl/init.lua:651: in function </home/khurram/torch/install/share/lua/5.1/trepl/init.lua:560>
    [string "require('trepl')()"]:1: in main chunk