從.txt文件讀取特定行

Question

我有大量的文本文件，裏面有很多信息。我只需要訪問一個星星與'***'的線。該行包含17個數字，它們之間有空格。該文件的

例子是，

Msg count = 2629  
max send msg count = 34  
avg send msg count = 10.27 
imbalance send msg count = 3.31  
------------------------------ 
max recv msg count = 35  
avg recv msg count = 10.27 
imbalance recv msg count = 3.41 

***1.100020 306852 1381937 11045 5398.19 2.05 10465 5398.19 1.94 2629 34 10.27 3.31 35 10.27 3.41 0.000000 


[INFO] +++ Sat Sep 24 15:15:33 2016 
+++ (test.c:816) stat1 end 

有沒有辦法做到這一點？

Answer 1

嘗試使用此代碼：

infilename = 'nameoffile.txt'; % name of your file 
m = memmapfile(infilename); % load file to memory (and after close it) 
instrings = strsplit(char(m.Data.'),'\n','CollapseDelimiters',true).'; 

checkstr = '***'; 
% find all string (their indices) starting with checkstr 
ind = find(strncmpi(instrings,checkstr,length(checkstr))); 


if isempty(ind) 
    fprintf('\n No strings with %s',checkstr) 
else 
    % first string with string checkstr 
    instrings(ind(1)); 
end