MATLAB: Append data to the end of a txt file…works for 1 line…it doesnt work for two lines

append datatxt

the above append alength to the end of 111.txt

clc
fid = fopen('C:\Users\Mr Andrew\Desktop\111.txt', 'a');
for k = 1:5
fprintf(fid,'alength \r\n')
end
fclose(fid);

but if i try this

clc
fid = fopen('C:\Users\Mr Andrew\Desktop\111.vbs', 'a');
for k = 1:5
fprintf(fid,'alength 
             blength   \r\n')
end
fclose(fid);

it doesnt work…what i am doing wrong? thank you…

Best Answer

 fprintf(fid,'alength\r\n blength\r\n') ;

Related Solutions

MATLAB: Use matlab to process a txt file

Sure. Write a loop and use fgetl to read the data, and use fprintf to print to another file. The documentation gives this example:

fid = fopen('fgetl.m');
tline = fgetl(fid);
while ischar(tline)
    disp(tline)
    tline = fgetl(fid);
end
fclose(fid);

Note that you you should read and write to different files, as the size of the data might change, so you might end up with something a bit like this:

fidR = fopen(sourcefilename,'rt');
fidW = fopen(destinationfilename,'wt');
tline = fgetl(fidR);
while ischar(tline)
    ... make whatever changes you need to tline
    fprintf(fidW,'%s\n',tline);
    tline = fgetl(fidR);
end
fclose(fidR);
fclose(fidW);

MATLAB: Append the content of a txt to the end of a txt….

You can read/write line by line with something like

 while ~feof(fid1)
    line = fgetl(fid1) ;
    fprintf(fid, '%s\r\n', line) ;
 end

but if you don't need to process the content, you could go for a more direct way, e.g.

 fid = fopen('content.txt', 'a') ;
 fwrite(fid, fileread('33.txt')) ;
 fclose(fid) ;

Now you could have a more robust approach which reads the content of the first file, determines if it ends with '\r\n', and adds it if not before appending the content of the second file.

Best Answer

Related Solutions

MATLAB: Use matlab to process a txt file

MATLAB: Append the content of a txt to the end of a txt….

Related Question