Matlab读取txt文件并找出开头相同的行并输出成另一个txt文件

关于文本数据读取我做过一些研究, 下面是解决你的问题的一个方法.

---- sample.txt ---------------------------
bread diaper beer egg milk
milk diaper beer cook
bread milk diaper beer
bread butter diaper milk
coffee sweat cookie fish
bread butter coffee diaper milk egg
bread butter fish chicken
egg bread butter
fish diaper milk
coffee sweat chicken egg

--- m file code ---------------------------
clc;
file = 'sample.txt';
fid = fopen(file,'r');
disp(['Reading file: ',file]);
linenumber = 0;
while ~feof(fid)
linenumber = linenumber + 1;
line = fgetl(fid);
if(line(1:6) == 'bread ')
disp([num2str(linenumber),':',line]);
end
end

---- output -------------------------------
Reading file: sample.txt
1:bread diaper beer egg milk
3:bread milk diaper beer
4:bread butter diaper milk
6:bread butter coffee diaper milk egg
7:bread butter fish chicken