You can use the following inside the callback function that starts the timer for 5 seconds
app.Gauge.Value = 0;
tic;
while toc<=5
app.Gauge.Value = toc/5*100;
pause(1/1000);
end
app.Gauge.Value = 100;
The while loop will run till "toc" returns value less than 5(seconds). In every iteration of the loop the Gauge value will be updated to a value between 0 and 100 proportional to time elapsed out of 5 seconds.
The "pause" is used so that some time is given for the Gauge display to update the value, the pause duration (in seconds) can be reduced as required to increase the smoothness in Guage motion.
At the end of the loop, the gauge value will be very close to 100 (of the order of the pause duration). Which is why the Gauge value is set to 100 (max) right after the loop ends.
