Matlab如何在三维数组上使用正则表达式？

Question

我的功能是一个文本文件＆＃39;在＆＃39;并返回一个文件，其中所有4个字母的单词替换为＆＃39; ****。＆＃39;到目前为止，我已经设法得到一个3d数组，每个单元格为1个字。如何将所有4个字母单词转换为＆＃39; ****？＆＃39;

%in.txt =

     %word words
     %words words words word
     %words
     %word word word



fid = fopen(in);

tline = fgetl(fid);
string = {''};
while ischar(tline)%create an array where each cell is 1 line
    string(length(string)+1) = {tline};
    tline = fgetl(fid);
end

str = {''};
for x=2:length(string)%create a matrix where each cell is is 1 line with each of those cells being 1 word
    str(x) = {split(string(x), ' ')};
    end
end

Answer 1

使用regexprep：

fid = fopen('in.txt', 'r');

% (when running in a function)
%OC = onCleanup(@() any(fopen('all')==fid) && fclose(fid));

data = regexprep(data{1}, ...
                 '\<(?:[-A-Za-z]{4})([^-A-Za-z]|$)',...
                 '****$1');            

fclose(fid);