您可以通过将时间戳转换为MATLAB datetime示例，构建timetable，然后使用retime来实现这一点，如下所示：

% First column is days after 2001-01-01; second column is temperature
values = [(0:7304)', randi([0 20], 7305, 1)];

% Make a timetable
values_tt = timetable(datetime(2001,01,01) + days(values(:,1)), values(:,2));

% Retime to get monthly average
retime(values_tt, 'monthly', 'mean')

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