MATLAB:获取文件的最后修改时间 [英] MATLAB: Get the last modification time of a file

问题描述

我正在寻找可以执行某些例程(更新 file.m )的MATLAB代码，如果对 file.csv 的编辑比对 file.m的编辑要近的话.

I am looking for MATLAB code that does some routine (updates a file.m), if file.csv is edited more recently than file.m.

应如下所示:

% Write time extraction
tempC     = GetFileTime('file.csv', [], 'Write');
tempdateC = tempC.date
tempM     = GetFileTime('file.m', [], 'Write');
tempdateM = tempM.date

% Write time comparison
if numel(dir('file.m')) == 0 || tempdateC >= tempdateM
    matDef = regexprep(fileread('file.csv'), '(\r\n|\r|\n)', ';\n');
    f = fopen('file.m', 'w');
    fwrite(f, ['Variable = [' matDef(1:end) '];']);
    fclose(f);
end

用于时间戳提取的行似乎是不正确的MATLAB代码.其余的有效(评估外部文件字符串中的变量).

The lines for timestamp extraction seem to be incorrect MATLAB code. The rest works (Evaluate variables in external file strings).

推荐答案

您可以使用MATLAB的

You can extract the modification time of a file using MATLAB's dir command. Something like:

function modTime = GetFileTime(fileName)
listing = dir(fileName);
% check we got a single entry corresponding to the file
assert(numel(listing) == 1, 'No such file: %s', fileName);
modTime = listing.datenum;
end

请注意，输出位于MATLAB的 datenum 序列日期格式.

Note that the output is in MATLAB's datenum serial date format.

这篇关于MATLAB:获取文件的最后修改时间的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！