How to use simulink to find minimums of a signal over successive intervals of time ???????

I want to use simulink blocks to find the mimimums ( different from zero ) of the signal below over chosen intervals of time:

For example: in the interval [0 200] the output must be about 28 in the interval [200 300] the output must be about 45 in the interval [300 500] the output must be about 80 and so on.....

the output from the block must be a continuous signal containing all the minimums from all intervals during the whole period of simulation. I want a continuous signal because I want that after each minimum found the output of the block stays equal to that minimum until the next minimum in the next interval is found.

Answer 1

[Swarooph]

Use the MinMax running resettable block and generate/pass a reset signal based on the time instant: http://www.mathworks.com/help/simulink/slref/minmaxrunningresettable.html