How to generate stair function ?

I want to generate a stair function from sensor measures in Simulink with certain specifications :

• My goal is to sample the measures I get from the sensor ; I am working on a Real Time Interface
• If time equals 0, I want the function's result to be equal to the sensor's measures
• If time ~= 0, I want to create a kind of discret signal : if time is not divisible by 1.72, I want the variable A to stock all the sensor's measures and the function's result should be equal to the previous definition. If time is divisible by 1.72, I want the function's result to be equal to the mean of the sensor's measures during the sampling period.

I have made this code, but it isn't working

function slopeSampling = SamplingFunction(slope, time)

if (time == 0)
    definitionSlopeSampling = slope;
    clear A;
else
    if(mod(time, 1.71) ~= 0)
        A = [A slope];
    else
        definitionSlopeSampling = mean(A);
    end
end

slopeSampling = definitionSlopeSampling;

end

Answer 1

[Robert]

If you have the DSP System Toolbox, you can use the included block Mean to calculate a running mean of your signal, then reset it every 1.72 seconds according to your design.

If you do not, you could recreate the running mean with a pair of discrete time integrator blocks.