Matlab - 在新文本文件中打印文本文件中的选定行

Question

我有一个文本文件，其内容例如是：

[1] John where are you bring me copy number = 1 4 5
[2] Hi, Sam what is the cost of your calculator = 200 500 800
[3] Nancy, bring me the no. of copy that I gave you = 4 8 5
[4] Hi, how many litres of milk you have = 10 12 6
[5] Peter, give your copy numb = 23 45 32
    & so on.

我对那些包含“复制”一词的行很感兴趣。下面的代码为我提供了文本文件中包含“copy”一词的行号。

 fid = fopen(‘my_file.txt', 'r');
 C   = textscan(fid, '%s', 'Delimiter', '\n');
 fclose(fid);

 % Search for string ‘copy’ and find all rows that matches it
 D    = strfind(C{1}, 'copy');
 rows = find(~cellfun('isempty', D));

我想在另一个文本文件中打印带有'copy'一词的那些行。

Answer 1

首先，您需要选择所需的内容：

C2=C{1}(rows);

fprint可以编写逗号分隔列表，允许在一行中写入文件：

fid2=fopen(....
fprintf(fid2,'%s\n',C2{:});
fclose(fid2);