create space between string output in matlab

rameshrai · Apr 19, 2014

hello,

does anybody know how to create space between string output in matlab?

for example:

halt(k) = 'A';
....
halt(k) = 'B';

disp(['Output: ', halt]);

The output is
output: ABAAAABBAABABAAABAAB

I want to create space between A and B in the output, they appear attached together

how to create space between them?

thanks

dougy83 · Apr 19, 2014

Post your actual code; there are typo's in what you provided. Also show what you actually want as output.

Misterbenn · Apr 23, 2014

simple answer is to put a space after you letters, so:
halt(k) = 'A'; becomes halt(k) = 'A ';

dougy83 · Apr 23, 2014

Misterbenn said:
halt(k) = 'A'; becomes halt(k) = 'A ';

That's invalid in matlab.

Misterbenn · Apr 24, 2014

No its not.

An extract of my MATLAB code

>> string1 = 'A ';
>> string2 = 'A';
>> disp([string1,string2])
A A

And further example

>> disp([string1,string2,string1,string2,string1])
A AA AA

dougy83 · Apr 24, 2014

Misterbenn said:
No its not.

Yes, it is invalid. string1 = 'A '; is not the same as halt(k) = 'A '; Try running the code you originally posted.

misterT · Apr 25, 2014

Maybe the easiest solution is to output every letter one by one in a loop. Then you can output space after every letter.

rameshrai · Apr 27, 2014

its looks so easy but difficult

dougy83 · Apr 27, 2014

rameshrai said:
its looks so easy but difficult

It is not difficult. I've listed a couple of methods to do it. The first uses a for loop, as suggested by misterT. The second (or third) uses strrep to replace parts of the halt string). This means that you only need to use a single method in each code block to get the described output. Using all lines in a code block will get a duplicated output.

For inserting a space between occurrences of A & B (which seems to be what you asked for):

Code:

>> for i=1:length(halt)-1, if halt(i)=='A' && halt(i+1)=='B', fprintf('A '); else fprintf('%c', halt(i)); end; end; fprintf('%c\n', halt(end));
>> disp(strrep(halt,'AB','A B'))

Output: A BAAAA BBAA BA BAAA BAA B (repeated on two lines)

If you wanted spaces between A & B and B & A, then

Code:

>> for i=1:length(halt)-1, if (halt(i)=='A' && halt(i+1)=='B') || (halt(i)=='B' && halt(i+1)=='A'), fprintf('%c ',halt(i)); else fprintf('%c', halt(i)); end; end; fprintf('%c\n', halt(end));
>> disp(strrep(strrep(halt,'AB','A B'),'BA','B A')

Output: A B AAAA BB AA B A B AAA B AA B (repeated on two lines)

Or if you actually just wanted a space between all characters,

Code:

>> for i=1:length(halt)-1, fprintf('%c ',halt(i)); end; fprintf('%c\n', halt(end));
>> str = [halt; halt*0+' ']; disp(str(:)');
>> disp(strrep(strrep(halt,'A','A '),'B','B ')

Output: A B A A A A B B A A B A B A A A B A A B (repeated on three lines)

Misterbenn · Apr 28, 2014

A further development might be to use the regexprep method:

disp(regexprep (halt, \w , $&+ ' ');

create space between string output in matlab

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