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Editing/Changing a text file's content based on input variable

조회 수: 4 (최근 30일)
Luffy
Luffy 2015년 10월 13일
댓글: Stephen23 2015년 10월 16일
I have a txt file which has the following content in the middle of the text:
set TC_SYS_01 0
set TC_SYS_02 0
...
set TC_SYS_38 0
Now if input is 10,the first 10 lines value has to be set to 1. example:=
set TC_SYS_01 1
...
set TC_SYS_10 1
----------------------------------- Updated Code------------------------------
% if input says 10
content = fileread('run.txt');
newcontent = regexprep(content, '(?<=set TC_SYS_\d*\s+)[01]','0');
% the above line is just to make sure all of them are 0,if any of them are 1;
fid = fopen('run.txt','w');
fwrite(fid,newcontent);
fclose(fid);
% now all lines are value is 0.
% Variable is 10,so first 10 to be set to 1
content = fileread('run.txt');
%%%%%%%%%%%%%%%%%
newcontent = regexprep(content, '(?<=set TC_SYS_[0]\d\s+)[01]','1'); %this line
%%%%%%%%%%%%%%%%%
fid = fopen('run.txt','w');
fwrite(fid,newcontent);
fclose(fid);
how to write the line with comment 'this line' so that i can directly write the variable into expression instead of hard coding as i have done in the above code ?

채택된 답변

Thorsten
Thorsten 2015년 10월 14일
편집: Thorsten 2015년 10월 14일
The idea is that you run the regexpr N times using the 'once' parameter. And you don't need so save the file intermediately after you have converted all the numbers to 0.
function changeTC_SYS(filename, N)
% Sets <num> to 1 in the first N lines of format "set TC_SYS_10 <num>".
content = fileread(filename);
content = regexprep(content, '(?<=set TC_SYS_\d*\s+)[01]','0');
% the above line is just to make sure all of them are 0,if any of them are 1;
for i = 1:N
content = regexprep(content, '(?<=set TC_SYS_\d*\s+)0', '1', 'once');
end
fid = fopen(filename,'w');
fwrite(fid,content);
fclose(fid);

추가 답변 (1개)

Stephen23
Stephen23 2015년 10월 14일
편집: Stephen23 2015년 10월 14일
Try this code:
N = 5; % <- how many line to change to '1'.
S = fileread('run.txt');
S = regexprep(S, '1\s*?$','0','lineanchors');
for k = 1:N
S = regexprep(S, '0\s*?$','1','lineanchors','once');
end
fid = fopen('new.txt','w');
fwrite(fid,S);
fclose(fid);
Which creates a text file new.txt that looks like this:
set TC_SYS_01 1
set TC_SYS_02 1
set TC_SYS_03 1
set TC_SYS_04 1
set TC_SYS_05 1
set TC_SYS_06 0
set TC_SYS_07 0
set TC_SYS_08 0
set TC_SYS_09 0
set TC_SYS_10 0
... etc
  댓글 수: 3
Luffy
Luffy 2015년 10월 14일
@ Thorsten: Yes the above code was changing 6 other similar lines which were above the set TC_SYS_01 line. After running the above code,we can set the lines which got changed back to 0.
Stephen23
Stephen23 2015년 10월 16일
"This works only if there are no other lines than.." which is exactly what was specified in the question. If there are other lines in the file then I am sure that the OP would know this and realize that this important information should be described in their question.

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