How to write all the character continuously

Hi guys. I got a question want to ask you guys. Below is my code.

    string = uint8(retrieveblock);
    export = sprintf('%d',string );
    export = bin2dec(export);
    char_export = char(export);
    display(char_export);
    fid = fopen('retrievedText.txt', 'w');
    fwrite(fid, char_export);
    fclose(fid);

This is within a for loop. my question is why I will just write the last character into the text file. Thanks and appreciate your opinion.

[Jan]

You can edit the original question to improve the formatting of the code. I've inserted a blank line before and after the code.

Please use meaningful tags. All questions in this forum concern "Matlab".

[Willam Willam]

Oops. Sorry. Did got any ideas? :)

Answer 1

[Jan]

You write all characters to the file, but all former characters are overwritten continuously.

You could open the file for appending instead of overwriting:

fid = fopen('retrievedText.txt', 'a');

But it would be much more efficient to open the file once only before the loop:

fid = fopen('retrievedText.txt', 'w');
for k = 1:1000
  ...
  fwrite(fid, char_export);
end
fclose(fid);

[Willam Willam]

Thanks ya Simon. The result is what I expected. Thank you very very much