How do I show a changing variable value in command window?

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Luis
Luis 2014-3-16
评论： Luis 2014-3-16
I am doing kind of Genetic Algorithm problem. It takes dozens of iterations before coming to a satisfactory solution. I want to show how the number of iteration grows IN ONE ROW in the command window.
I only know how to do it in rows one after another, here's the code:
if %Stopping Criterion%
break;
else
iteration = iteration +1 ;
fprintf('Iteration = %d \n',iteration);
end
As you know , in the command window, this will be:
Iteration = 2
Iteration = 3
Iteration = 4
Iteration = 5
Iteration = 6
Iteration = 7
.
.
.
My concern is, I want to display the result ONLY IN ONE ROW, that is, "Iteration =" does not show again, ONLY the growing value of the iteration changes.
How could I make it?
Thanks in advance:)

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采纳的回答

Walter Roberson
Walter Roberson 2014-3-16
Before you start the loop,
fprintf('Iteration =');
In the loop,
fprintf(' %d', iteration);
after the loop:
fprintf('\n');
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Walter Roberson
Walter Roberson 2014-3-16
The 0000 is not important other than it being 4 characters long so that you get positioned at the right position. Each \b backspaces one position so \b\b\b\b moves to the beginning of those 4 positions. The %4d says to use 4 characters (more if needed) to output the number... leaving you at the same position on the screen as you were after the 0000 . Thus each line after that backs up over the previous number and puts in a new 4 character number.
If your iteration count might exceed 9999 then you would need to increase the number of characters initially printed and you would need to add more \b

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