How to write literal text from character array to a file

I can easily read a Matlab script into a character array using readtextfile. How do I reverse the process? I want to write the character array to a text file, including all the % and \ characters that fprintf interprets as control characters. How do I suppress fprintf's interpreting the % and \ etc and get it to just write the literal text exactly as it appears in the character array and exactly as it appeared in the Matlab script that was read into the character array? Or is there some other output function that I should use?

Answer 1

[Guillaume]

fprintf('%s', chararray)

should work

[Charles Gallistel]

I tried this. It doesn't work. I think the problem is, at least in part, that the fprintf command interprets the numerous % characters that occur in the code file (signifying comments) as control characters. The output I get is gibberish

[Charles Gallistel]

Success. Here's what works:

   % makes each row into a cell AND SUPPRESSES TRAILING WHITESPACE!
    CellArray = strcat(CharArray); 
    fid = fopen('SampleScript.m','w');
    for r=1:size(CellArray,1)
        fprintf(fid,'%s\n',CellArray(r,:));
    end
    fclose(fid);

[per isakson]

Yes, it works. However, (in R2013a) the character array is not converted to a cell array and the trailing spaces are not "suppressed".

I tested with this script

    char_array = char( randi([65,90], 4,12 ) );
    char_array( 2:3, 9:12 ) = ' ';
    cell_array = strcat( char_array );
    for jj = 1:4
        fprintf( '%d: %s\n', length(char_array(jj,:)),char_array(jj,:) )
    end
    fprintf('\n')
    whos char_array cell_array

Output in the command window

    12: KEXIUCOVQORU
    12: BGYXKDBA    
    12: GKMJGYGB    
    12: DBMCKYJELEQU

      Name            Size            Bytes  Class    Attributes
      cell_array      4x12               96  char               
      char_array      4x12               96  char               
    >>

[Guillaume]

@Charles,

fprintf('%s', chararray)

does not interpret any character in chararray including % and \. These characters are only interpreted in the format string,

>>fprintf('%s', 'A string with some  % signs %d%f and \ characters \t\n')

returns

A string with some  % signs %d%f and \ characters \t\n

I'll note that what you say works is exactly my answer with the addition of a \n control character in the format string. That addition, in no way modifies the behaviour of fprintf. With or without it, the string is interpreted the same way.

Answer 2

[Richard Zapor]

Use fwrite.

str='\a%s';

fileID=fopen('AllCharFile.txt','w')

fwrite(fileID,double(str));

fclose(fileID)