How to write literal text from character array to a file

10 次查看（过去 30 天）
Charles Gallistel
Charles Gallistel 2014-11-11
回答： Richard Zapor 2021-11-20
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?

请先登录，再回答此问题。

回答（2 个）

Guillaume
Guillaume 2014-11-11
fprintf('%s', chararray)
should work
  4 个评论
显示 2更早的评论
per isakson
per isakson 2014-11-12
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
Guillaume 2014-11-13
编辑：Guillaume 2014-11-13
@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.

请先登录，再进行评论。

Richard Zapor
Richard Zapor 2021-11-20
Use fwrite.
str='\a%s';
fileID=fopen('AllCharFile.txt','w')
fwrite(fileID,double(str));
fclose(fileID)

类别

在 Help Center 和 File Exchange 中查找有关 Characters and Strings 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by