MATLAB: How to put a header in a txt file

headerhelpputtext filetxt

I'd like to put a header in my .txt file. I have a file with 744 lines like below. And I wanna put on the first line the header 'hora'.

Best Answer

Straight-forward solution would be like this:

% Read the file
fid = fopen('yourData.txt','r');
str = textscan(fid,'%s','Delimiter','\n');
fclose(fid);
% Add your header
str2 = [{'hola!'}; str{1}];
% Save as a text file
fid2 = fopen('output.txt','w');
fprintf(fid2,'%s\n', str2{:});
fclose(fid2);

Related Solutions

MATLAB: Concatenate data using fgets

You are closing the file in the loop. close the file after the loop. I assume the below should work.

function read_datapattern(filename)
fid = fopen(filename,'rt');
if fid < 0
  error('error opening file %s\n\n',filename);
end
pattern = fgets(fid);
for n = 1:32767
  nextline = fgets(fid);
  pattern = strcat(pattern, nextline);
fprintf(pattern);
fprintf('\n');
end
fclose(fid);

MATLAB: How to remove some lines of a file

Assuming your file is a text file, you can extract the first 744 lines ans save it like this:

% Full path of the sample text file
filePath = fullfile(matlabroot,'examples','matlab','sonnets.txt');
% Read the file
fid = fopen(filePath,'r');
str = textscan(fid,'%s','Delimiter','\n');
fclose(fid);
% Extract first 744 lines
str2 = str{1}(1:744);
% Save as a text file
fid2 = fopen('test.txt','w');
fprintf(fid2,'%s\n', str2{:});
fclose(fid2);

Best Answer

Related Solutions

MATLAB: Concatenate data using fgets

MATLAB: How to remove some lines of a file

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