Matlab - displaying an object on a graph - matlab

Question

I have a function for a timer as follows
HH = 0; MM = 0; SS = 0;
timer = sprintf('%02d:%02d:%02d',HH,MM,SS);
for p = 1:86400
SS = SS + 1;
if SS == 60
MM = MM + 1;
SS = 0;
pause(0.01)
end
if MM == 60
HH = HH + 1;
MM = 0;
pause(0.1)
end
HH;
end
disp(timer)
How can i get this to display on a graph while constantly updating. Have not been able to get it to work using the plot() or set() function.

Answer 1

You might want to adjust the particulars of this example based on how you want the timer to look, and notice that I just put a pause(0.1) for each second of the clock, so you can watch it faster than real time as indicated in your example. You can also adjust the size/color of the clock with different arguments to the text() function.
f = figure;
HH = 0; MM = 0; SS = 0;
timer = sprintf('%02d:%02d:%02d',HH,MM,SS);
text(0.5,0.5,timer); %% adjust location of clock in graph using the first two arguments: (x,y) coordinates
for p = 1:86400
SS = SS + 1;
pause(0.1); %% pause a fixed amount for each clock tick
if SS == 60
MM = MM + 1;
SS = 0;
end
if MM == 60
HH = HH + 1;
MM = 0;
end
timer = sprintf('%02d:%02d:%02d',HH,MM,SS); %% construct time string after all adjustments to HH, MM, SS
clf; %% clear previous clock display
text(0.5,0.5,timer); %% re-plot time to figure
end