How to remove lines in a .txt file?
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Hello,
Basically, I have a .txt file in which I have a first string of characters, a second string of characters divided in 5 columns and finally the following lines are divided in 5 columns as well and filled with numbers.
As a scheme explains better than my bad english, the layout is the following one :
Nodal displacements (DX,DY,DZ) [Code 163] (Vibration Mode Number)
Node Component X Component Y Component Z Modulus
11424 1 -0.1784254 -0.14097163 1.02552846
11428 0.99940151 -0.17841142 -0.14048249 1.02487528
11427 0.99868083 -0.17837693 -0.13998173 1.02409795
11426 0.99781752 -0.17834243 -0.13945551 1.02317821
11425 0.99682903 -0.17832828 -0.13891853 1.02213867
11423 0.97537661 -0.17893241 -0.14097127 1.0016233
11437 0.97482145 -0.17892055 -0.14049338 1.00101339
...
I'd like to develop a routine that reads and writes the .txt file to delete the two first lines of characters, i.e.,
Nodal displacements (DX,DY,DZ) [Code 163] (Vibration Mode Number)
Node Component X Component Y Component Z Modulus ,
to be able to have a 5-columns array with nothing but only numbers that I can load in Matlab...
Thanks in advance. O.
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採用された回答
Cedric
2013 年 4 月 14 日
編集済み: Cedric
2013 年 4 月 14 日
If you read the file using TEXTREAD, you don't need to have the file truncated first, because you can tell TEXTREAD to skip a given number of header lines. Look at the doc for this function and the parameter named 'headerlines'. Example:
[node, X, Y, Z, modulus] = textread('myFile.txt', '%f %f %f %f %f', ...
'headerlines', 2) ;
If you really want to remove 2 lines from a file, you can build a solution around:
fid = fopen('myFile.txt', 'r') ; % Open source file.
fgetl(fid) ; % Read/discard line.
fgetl(fid) ; % Read/discard line.
buffer = fread(fid, Inf) ; % Read rest of the file.
fclose(fid)
fid = fopen('myFile_truncated.txt', 'w') ; % Open destination file.
fwrite(fid, buffer) ; % Save to file.
fclose(fid) ;
4 件のコメント
Anna
2016 年 7 月 31 日
How do I repeat this for every .txt file in the folder without manually typing the names in?
その他の回答 (2 件)
Hazem
2017 年 6 月 13 日
My favorite solution is this (start at line 2, col 0):
M = dlmread('filename.txt', ' ', 2, 0)
0 件のコメント
Tobias
2013 年 4 月 14 日
編集済み: Tobias
2013 年 4 月 14 日
I have been given the following code by a teacher at university:
function allData =ReadVerTxtData(filename,NumVar)
fid=fopen(filename,'r');
tline1 = fgetl(fid); %%Vernier Format 2
tline2 = fgetl(fid); %Untitled.cmbl 4/7/2008 20:19:02 .
tline3 = fgetl(fid); %Latest
tline4 = fgetl(fid); %Time Potential
tline5 = fgetl(fid); %t Pot
tline6 = fgetl(fid); %s V
tline7 = fgetl(fid); %
tline8 = fgetl(fid); %0 7.60683760684
allData=fscanf(fid,'%f',[NumVar,Inf]); %
fclose(fid);
It reads data from a text file and ignores the first 8 lines. You could add and delete lines as you desire.
Edit: I should probably add that the two inputs of the function is: your file directory + name AND the number variables / lines you want printed into matlab, 5 in your case.
2 件のコメント
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