Plotting several graphs in a single one

*Actually I have an optimization script. After running this script I get a graph. My question is how can I plot three graphs after running the script three times. It is obvious that I can not use from the *hold on and subplot. One idea is saving the date after each run and plotting them, but I do not know how can I save the data after each step and then use them to plot a final graph.**

[Azzi Abdelmalek]

Post your script

[Walter Roberson]

It is not obvious to me that you cannot use "hold on" or "subplot". But you have not made clear whether you need the three graphs to overlay each other or if they should appear side by side ?

Answer 1

[Image Analyst]

Put this in your script:

if exist('figureNumber', 'var')
  % Increment figure number.
  figureNumber = figureNumber + 1;
else
  % Doesn't exist yet.  Declare figureNumber.
  % Start with figure #1.
  figureNumber = 1;
end
figure(figureNumber);

BUT MAKE SURE YOU DON'T HAVE A CLEAR ALL ANYWHERE IN YOUR SCRIPT!

[ali]

Thanks for responding.

I put this in to my script but I did not see any additional graph after second run? would you please give more guide? (I have no clear all in my script.)

[Image Analyst]

It works. I don't know how you adapted it into your script. Attach your script.

[ali]

Thanks again. Attached is my script. I want to have tree graphs by running the scripts three times (in each try line 29 changes, so we have a new graph). the figure command comes in line 225. I want all of the three graphs be plotted in a single one. thanks for helping.

[Image Analyst]

First of all that's a function, NOT a script. So all that stuff I said about using figureNumber doesn't apply anymore because it's a function. Secondly, you ARE using clear all despite what I said. So basically it blows away all the arguments you just passed in!!!

To fix, you must get rid of clear all, like I already said. Then you must use persistent variables because it's a function not a script. See if you can do that - I'm tied up at the moment and can't make a demo for you right now.

[ali]

I would be appreciated if you explain more when you have time.

[Image Analyst]

If you're going to use functions in stead of scripts, make your variable persistent like this:

function test()
persistent figureNumber;
try
  if isempty(figureNumber)
    % Doesn't exist yet.  Declare figureNumber.
    % Start with figure #1.
    figureNumber = 1;
  else
    % Increment figure number.
    figureNumber = figureNumber + 1;
  end
  figure(figureNumber);
catch ME
  errorMessage = sprintf('Error in function %s() at line %d.\n\nError Message:\n%s', ...
    ME.stack(1).name, ME.stack(1).line, ME.message);
  fprintf(1, '%s\n', errorMessage);
  uiwait(warndlg(errorMessage));
end