MATLAB: How to convert each row of the matrix into a Character array, without using a for command

Question

Matlab code:

A=rand(1e3,2);%just an example
for i=1:size(A,1)
      B{i}=num2str(A(i,:));
end

Question: The cost time of the code is related to the size of A. How can I get the B without the For command and spend as less time as possible?

Answer 1

Preallocate B may help just tad...

Alternatives to loop include

B=cellstr(num2str(A));

but what is end purpose for doing the conversion? Perhaps could avoid entirely??? The most time-saving optimization is the one that avoids doing the unneeded... :)