PrintMatStructure.m

function PrintMatStructure(matFile, outputFile)
% PrintMatStructure - 将 MAT 文件的结构打印到文本文件
%
% 用法:
%   PrintMatStructure              % 弹出文件选择对话框
%   PrintMatStructure('result.mat')
%   PrintMatStructure('result.mat', 'structure.txt')

if nargin < 1 || isempty(matFile)
    [file, path] = uigetfile('*.mat', '选择 MAT 文件');
    if isequal(file, 0), return; end
    matFile = fullfile(path, file);
end

if nargin < 2 || isempty(outputFile)
    [folder, name, ~] = fileparts(matFile);
    outputFile = fullfile(folder, [name '_structure.txt']);
end

% 使用 whos 获取变量信息
info = whos('-file', matFile);
data = load(matFile);

% 写入文件
fid = fopen(outputFile, 'w', 'n', 'UTF-8');
fprintf(fid, '# %s\n# %s\n\n', matFile, datetime('now'));

for i = 1:length(info)
    fprintf(fid, '%s: [%s] %s\n', info(i).name, info(i).class, sizeStr(info(i).size));
    if isstruct(data.(info(i).name)) && isscalar(data.(info(i).name))
        printStruct(fid, data.(info(i).name), '  ');
    end
end

fclose(fid);
fprintf('已保存: %s\n', outputFile);
end

function printStruct(fid, s, indent)
    fields = fieldnames(s);
    for i = 1:length(fields)
        v = s.(fields{i});
        if isstruct(v) && isscalar(v)
            fprintf(fid, '%s.%s: [struct]\n', indent, fields{i});
            printStruct(fid, v, [indent '  ']);
        else
            fprintf(fid, '%s.%s: [%s] %s\n', indent, fields{i}, typeStr(v), sizeStr(size(v)));
        end
    end
end

function s = typeStr(v)
    s = class(v);
    if isnumeric(v) && ~isreal(v)
        s = [s ' complex'];
    end
end

function s = sizeStr(sz)
    s = strjoin(string(sz), 'x');
end