Question

I have a question that I dont know how to figure it out. I am plotting my real time data obtained from temperature sensors in MATLAB. The sensor software generates the text file for each sensor and updates it after every minute. What do I have to do if I want the plot to be updated after certain period of time; let’s say after 10 or 20 values or after every 5 mins.

Answer 1

You could use a timer.

Reusing the code of Nzbuu, it would be something like the following

function ReadAndUpdate
  [X,Y] = readFile(); % Read file 
  set(h, 'XData', X, 'YData', Y) % Update line data    
end
t = timer('TimerFcn',@ReadAndUpdate, 'Period', 5*60, ...
          'ExecutionMode', 'fixedDelay')
start(t) 

Here the function is trigged infinitely but you can stop it or set a condition.