use of msgbox in matlab

hi,

I tried to use the msgbox function in matlab, which I found here:

http://www.mathworks.ch/ch/help/matlab/ref/msgbox.html

I tried to take the formula to display at which i we are currrently with the code:

h = msgbox(i)

unfortunately it's not working at all. From VBA I know that it's just necessary to enter msgbox and the variable, but that doesn't work either

what do I need t change?

Answer 1

[Image Analyst]

You need to pass it a string

for k = 1 : 10
  message = sprintf('k = %4d\n', k);
  uiwait(msgbox(message));
  % You can use fprintf() instead if you don't want to prompt the user.
  fprintf(message); % Goes to command window.
end

Or better yet, use questdlg() so the user can have an opportunity to break out of your 1000 iteration loop:

for k = 1 : 10
  message = sprintf('k = %4d\nContinue?', k);
  reply = questdlg(message, 'Continue', 'OK', 'Cancel', 'OK');
  if strcmpi(reply, 'Cancel')
    % User said Cancel, so exit.
    break;
  end
end

I used k as a loop variable because you're not supposed to use i or j - they're the imaginary variable.

[Locks]

thanks, that helps!

Answer 2

[per isakson]

    >> h = msgbox('This is my message') 
    h =
        0.0012
    >>

works fine here. Message should be a string.

[Added:] To show the value of the numeric variable: i

     h = msgbox( num2str( i ) )

VB do things more automagically than Matlab. Here you need to do the conversion explicitely.

Answer 3

[Locks]

What do I need to do if I would like to see which value the i has, which runs form 1 to 1000?

[per isakson]

Se my answer above.