A Message Box for a Nested Loop to Report Progress?

I have a nested loop that takes minutes to finish. I want to put a piece of code in the position of Statement2 to know about the progress of the loop (i.e., every iteration of “i” roughly equals 10 percent of the whole progress).

1) Any suggestion for a message box that shows me the progress? 2) How can I generally estimate the time a loop needs to finish?

for i = 1 : 10
    for j = 1 : 200
        Statement1
    end

      Statement2

end

Answer 1

[Guillaume]

"How can I generally estimate the time a loop needs to finish"

You can't.

"Any suggestion for a message box that shows me the progress"

Use a waitbar:

hbar = waitbar(0, 'Processing...')
numsteps = 10;
for i = 1:numstep
  waitbar(i/numstep, hbar, sprintf('At step %n', i));
  %...
end