Need help with the code.

i want to swaps characters of s as specified by the indices present in the pairs variable. pairs is a 2-column matrix, where on each row, i have given the positions of the two characters that need to swap. eg s = orange & pairs = [1 2]. out expected is roange. what changes you recommend in this code.

function [arr] = shuffletext ( pairs, s)
a = 0;
b = 0;
for i = 1:numel(s)
	for j = pairs 
		s(i) = a;
		a = b;
		b = s(i);
	end 
end
arr = b; 

Still its not showing any output just a blank if i call the function

using: disp( shuffletext( [1 2], 'orange') )

Output

>> disp( shuffletext( [1 2], 'orange') )
 
>> 

Answer 1

[DGM]

Try this.

shuffletext2([1 2; 3 4; 5 6], 'orange') 

ans = 'ronaeg'

function [intext] = shuffletext2(pairs,intext)
    for p = 1:size(pairs,1)
        intext(pairs(p,:)) = intext(fliplr(pairs(p,:)));
    end
end