Re: Real Time plot from C++ data

[rocketsound]

A quick-'n-dirty way to solve this is to extend your C++ program so that it
writes its messages into a textfile. In Octave you create a infinite loop
and use pause to wait between loop cycles and dir to get file stats of the
log file you're interested. Something like this:

/filepath = 'C:\\my.log';
prevtime = dir(filepath).datenum;
figure;
hold on;
%loopcounter = 0;
while true
  currtime = dir('C:\\my.log').datenum;
  if currtime > prevtime
    prevtime = currtime;
    % see http://octave.sourceforge.net/octave/function/textread.html
    [n, x, y] = textread(filepath, '%d %f %f');
    plot(x(end), y(end));
  end
  pause(1.0);
  
%  % Uncomment if you want to stop the infinite loop if log file doesn't
change
%  loopcounter = loopcounter + 1;
%  if(loopcounter > 25)
%    break;
%  end
end/

Probably there is much better way to solve this but if you don't need a
"customer-ready" solution this might help you. You can cancel the program at
any time via STRG+C or by uncommenting the last lines and the one at the
start of the code.



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